players plays indeed for fun in the first place. Second is to have a tier 10 ship of that country line.
Your second argumentation doesn't go up because WG created already 2 different gamemodes for it; Clanbattle's and Ranked battle's. At some point the good players met the other good players in the game, ones they reached the top places.
The average players get sick of all that whining about winrate and being potatoes and stuff like that. Because the result is ; they get insulted by every 'good player'/ self proclaimed good players' because these players are only in for the winrate number of their own account.
The MM isn't a good mechanic at all for it, because tier 8 get teamed up against tier 9 and tier 10 ships. The best example I use for it are the Pan-Asian destroyer lines.
Tier 8 = 8 km torps.
Tier 9 = 10 km torps.
Tier 10 = 13.5 km torps.
As tier 8 you end up in a tier 10 match but doesn't has the equipment for it. Your torps lack of range to achieve it in comparising with that tier 10 that has 13.5 km torp range. It means you as tier 10 Pan- Asian player has the equipment to stay out of radar range and has a chance to harm that opponent witch has radar of 10km or even 12 km range. But as tier 8 you end up anyway in a tier 10 match.
For WG it's a possibility to make money out of it, most players skipp tier 9 for example , because they use free XP for it or convert Elite XP to transfer it in free XP to be able to skip that tier 9 line.
For the most average players; it's indeed for fun and they do it in their free time. For most of the players it's a 1 hour to 2 hours gameplay in the evening and even then most of that time is used to play different lines to see what suits them best. And the average players takes also everytime their captain they've used from tier 1 up to the next tier. But they get punished for it, because everytime they have to retrain him. So even with their captain, they lack the ability to the tier 10 player.
And then you have the games of the CC communtiy players, free XP, free credits and free doubloons. Some of these CC community players play even 6 to 10 hours a day. Of course they show their best results and have matches over 200K damage and carried the game. What you actually compaire ? Players that play it everyday and get all the experience of that ship already because they've played already hundred of games with it on the testservers to players that get that ship for the first time in their hands and with no bonusses at all for it. They don't even have the shipupgrades for it, These first average players doesn't even have any shipupgrades for it because they need the first games to play with it. But they are insulted all the time that they are potato players …..
And if I come back to the 'fun' part of the game. For the most average player the fun was out of the game for more then 6 months with the CV rework. 3 classes where all punished by WG , just because WG wanted more CV players. They've upsetted 3 classes to benefit 1 class in the game. For most average player , it was a breaking point at that moment and also their trust was gone in WG . It was not the case of just that the CV's were OP, it took the whole gameplay away. DD's and concealment, gone by the CV rework. Cruisers that relay on 'kiting' to have decent games for example, punished by WG with the CV rework. BB's that 'tanked' punished by WG with the CV rework . For most players the fun was totally gone.
With the CV rework patch 08.05 and the promise of the patches 08.06 and 08.07 WG was able to restore some trust in the game and the average player still wish to achieve that 'fun' part they had before the CV rework. Then you had the announcements that MM would finally be also reworked. So players trust WG again in the hope WG shall finally get it right for the average players that 'grinds' their ships .
It's the long future that shall decide if it shall work … 2020 shall be the year of the result of it, then patches 08.06 and 08.07 shall be here and then the results, also for the MM fix shall be determined by the players experience. If it's still like we had in the past, then the players shall move on to other places. Because the WG would have used around 1 year of the meta server or the average players time to fix something WG created badly at the start . How long exists WoW's ? 3 - 4 years ? And WG needs 1/3 or 1/4 of that time to use their gameplayers to fix an issue that none of these players actually asked for with the CV rework.