Acting like being a tomboy eliminates the possibility of being trans (not the literal argument but what comes across) is like calling taiyaki daifuku because both contain red bean paste. It's fallacious.
That can't possibly be taiyaki! I mean, it has red bean paste in it!!
In their minds, a person can literally say they are trans and end up happy with their transition, yet still not be trans enough. Genuinely, what would make a character trans to you if literally saying and showing it isn't enough?
An anecdote about a cis tomboy they know being happy as a wife (appeal to tradition) somehow invalidates all the trans men who are happy in their transition. Both experiences are valid. You don't get one without the other. I am so glad that other users don't care for those comments and rightly call their nonsense out.
If you have a genuine interest in the trans experience and aren't just injecting your anti-trans politics into this manga, then please watch channels like
Ty Turner,
Jammidodger, and
Noah Finnce with an open mind. They also appeared to be tomboys when they were little. Guess they're not trans anymore. Gotta go collect their trans cards now, I suppose.
Plenty of Eastern nations had trans folks under a different label (see Babaylan, or just do research instead of inserting yourselves into a topic with naught but assumptions and fallacies) before Westerners came and forced cis-heteronormativity (or what they call Christian traditional values, even though not all Christians enforce them) down their throats.
The only Western ideology present in the trans "debate" is transphobia.