This is the part of the game that no one cares about but a single percentage of the community. If you care about metas in a fucking children's game, you are beyond the target demo that game devs should care about.
Showdown, VGC and likes of Nuzlockes and Randomizers(which no matter what people will tell you require some knowledge of the game and most of the pokemon) say otherwise, so even if that's just a minority of total people that play pokemon that's still much more than "a single percentage".
You are correct in that vast majority of the people that play these games, just out of their sheer appeal, simply don't know how to play them due to them being children or normalfags...then again, I was once a normalfag and a child that played these games and even I learned more indepth info about these games so there is no excuse(funnily enough, that was the point where I discovered Battle Frontier existed in Emerald, and that my shitmon/funmon team would simply not cut it in the Battle Pike, something I assume that wasn't on the to-do list for vast majority of casual Emerald players with how much of a timesink that entire part of the game was).
That does bring up a good point: If vast majority of people don't continue past Elite Four, let alone ever reach them, that doesn't make their point on the franchise valid, now does it? They're the tourists who consoom the game every year and then leave it alone after a few weeks, similarly to all the people who buy the new COD or Fifa every year but put it down before a month goes by. Even if that is who Gamefreak appeals to, that doesn't change anything, just goes to show that Gamefreak only cares about money and not the franchise as a whole(similarly to the games I just mentioned)
These are the kinds of people that were a large part of the Unova hate club and the Dexit apathy club, as they simple don't care beyond the simple argument of "This game has Pikachu/Doesn't have one". This is literally all that shapes their outlook, I would go further and say that Charizard and other Kanto shitmons follow the same route but apparently SV and even SwSh at launch were missing quite a few of them, so I am guessing it's just literally Pikachu that people care about(and maybe Charizard and other Kanto starters).
That's what my last post was pointing towards btw, if you can't actually make an effortpost regarding the battling system of the game(which even the newer, more casual games put a big emphasis on) then that person't opinion simply doesn't matter. You don't need to be a smogon tryhard, but you do need to understand the meta of existing region pokemon and how each shapes the unique region dex of each game. That, in my mind is the bare minimal gatekeeping point, otherwise they might as well be actual children that have absolutely no idea what they're talking about(of course, my opinion doesn't matter either since Gamefreak only pays attention to what they can safely cut out of the game to save development budget on or what they can sell back later. I and other actual fans of the game don't get a say or even get catered to anymore)
Oh, and regarding "Hard Mode", I think the games just need to be harder, period. Pokemon was never a hard game, but there was a time that you could get screwed over if you absolutely weren't even thinking about team building, ergo why Twitch Plays Pokemon completed the first two gens but got stuck on Emerald, as you can't literally just button mash that game, same goes for Platinum and Gamecube titles and even arguably Gen 5 titles, even if that's where the games really started to start pander to casuals with the arbitrary 3 Pokemon limit on Gym Leaders and a similar limit on Elite 4 Leaders.
There is a sweet spot between a romhack tier slog that forces you to create competitive sets to even be able to compete in the gyms and the newer titles where you can go on autopilot mode all the way thru because the games are targeted at the same kinds of people who you will try to shill a DLC pass towards, ie idiots who want an easy game because if it challenges them at any point, they will turn it off and that's a sale lost.