Couple things. According to all the census data available to us, albeit unofficially, NA outnumbers JP quite handedly by slightly over 150,000. Once you factor in EU, which is predominantly English speaking, you'll quickly find that no, Japanese players, are not the majority. They haven't been for years now. In fact, the console and AAA gaming industry as a whole, including JRPG titles, typically do significantly better in North American than Japan due to the latter's higher interest in mobile gaming.
Furthermore, you, anecdotally, showing this thread off to a couple discord friends and all having a giggle isn't any different than people laughing on TalesofDF. You're welcome to find this whole thing absurd just as other, paying customers, are welcome to criticise a design approach they dislike. And before you cry foul about "organizing a strike!" How people voice their criticism isn't for you to decide so long as they follow the rules. To be blunt though, we've all tried to have discussions. There are threads on this very forums several hundred pages long--one in particular even got brought up in a Q&A... where it was poorly translated and healers were told to "just do Ultimate." Bit ironic how the sustain has gotten so out of hand, players were able to beat said Ultimate (TOP, specifically) without healers.
With all that said, I suggest you take your own advice and kindly "know your place" by allowing others to voice their criticism.