I don't think they are doing this height setting as a form of censorship, I think most can all agree that would be silly as most of you were saying. Its probably more likely due to that's the general NA height standard and most commonly known for or it could be NA's version to be different from JP's version. There is likely going to be a lot of different things good or bad to the game but something like this shouldn't really be a topic of issue. Honestly my biggest gripe would be if they made this height limitation because they plan on allowing you to customize your characters more through being premium membership or something of that nature. I'm not total against it cause I believe the game does deserve some support but it wouldn't be the first time I seen something free in one version but cost in another. If this was really done to just censoring then wow.
It is a topic issue though. I know they don't have to give a reason for it. But even a few CM height difference can make you lose significant time in TA, SR, Trials, and any other content that uses I-frames, hit boxes, and frame data. Height measurement in the game actually plays a pretty big role for the Speedrunning community for this game. I'm not saying this in anyway to put down what you are saying and it won't stop me from playing and enjoying the game. Just giving another perspective to how big of a change height differences make in this game.