I dunno I find the JRPG tag akin to the anime tag. If you get down to it anime as a category covers a wide range of genres, art styles, animation styles , and so on. That said there is a DNA throughout that does unite a lot of anime. Series and creators are inspired by other older anime and manga and games and even the non japanese pop culture that influences the creators is filtered by the impact that thing had in Japan.

As a category JRPG used to refer to a very specific story heavy game with turn based combat and usually random battles and leveling up that originates in japan. There are many modern games that have evolved beyond that old school system and look, but the DNA is still there. FFXV despite being open world, having action based combat, and realistic graphics still feels more like a classic final fantasy than it does like Fallout or elders scroll.

I also feel like that there's a bit of revisionism towards bias against JRPGs. I was chronically online in the 00s on gaming message boards and RPGs were held up as a gold standard among a lot of gamers and I bet even today you'd find quite a few "BEST GAME EVER" lists that would put FFVII and VIII and chrono trigger up there as some of the best of all time.

In the console space at least in the US the default RPG was JRPG for the longest time. There were some western RPGs on consoles but they were few and far between and not nearly as popular. It wasnt until the xbox into the 360 and ps3 gen that C-RPG devs started releasing on consoles. After years of being low sellers on PC this subgenre hit the mainstream and felt like a breath of fresh air especially with this not being the best year for many landmark JRPGs like Final Fantasy.

It is at THIS point in the late 00s into the early to mid 10s that things start getting toxic because gamers are gamers and have abrasive and bad communication skills. I feel like even then these kinds of dickheads werent in a majority and sales of big name Japanese RPGs along side the slow trickle of formerly japan only RPGs like Dragon Quest show that the demand and success is still there. At most there was a brief dip as many Japanese "style" games in general fell out of fashion with western gamers as western devs started getting more and more of the console pie.

I dunno it feels more like there was a blip in sales and the dev is trying to rationalize it as racism based on toxic gamer culture. Which is a fair assumption to make towards gamers but they still sell millions.