I've created no issues. I've identified issues that were already there. Some of you don't care about those issues. Some of us do.
The issues of Centaur player characters being large do not exist. Large, playable Centaurs do not exist. You need to homebrew those. Unless you can quote me a 5e book that has the racial stats for a large centaur playable race.
And the DMG toolkit for homebrewing a race doesn't count, because that is homebrewing, which is exactly what I am claiming you are doing.
It's not a home brew. It's RAW. The rules I am using, and they ARE rules, are on page 38 of the MM. I can use the rules on page 47 to allow a death knight PC as well. The existence of new alternate rules does not invalidate older rules.
There is no rule in the game that allows you to use a Monster from the Monster Manual as a player character race.
Doing so is homebrewing. Monster Manual statblocks are the purview of the DM, not the players.
It makes perfect sense and saying that we shouldn't be discussing how centaurs SHOULD be, just because they involve problems I've identified is trying and are not confined to the Ravnica centaur rules is trying to shut me up. Discussing changes/alternate rules is a valid part of discussing what a centaur should or should not be able to do.
Discussing your homebrew is not discussing how centaurs "should be". That is discussing how you think they should be, and how you homebrewed them to be.
And again, if you want to homebrew, that is entirely in your rights to do so. A fact you know since you believe in the "DM is the Ultimate Authority" model. But, if you homebrew that centaurs as a playable race are large, and then begin laying out the challenges they face for being large, you have created the very scenario causing those challenges.
Just like if you homebrew that Elves are true fey and hate the feel of iron and steel, you then really don't have a leg to stand on saying that Elves make poor fighters because they can't use armor and weapons. You made them poor fighters by homebrewing them to be poor fighters. The issues and challenges end and begin with your choices.