i think more people need to sit down and unpack their understanding of how the world mistreats transfeminized people. most people simply do not understand the full extent of it and don't care to step outside their comfort zones and learn. because of that, when they see something that makes them uncomfortable, they try to come up with reasons why it's wrong, rather than having to confront their current assumptions. i hope you can set that aside for a moment and really consider what i'm about to say.
the world is not kind to transfems, and the systems of oppression in place do not want people to become transfem. so transfemininity is discouraged from all angles. if you can keep a trans woman from realizing who she is, she'll never have the tools or understanding to speak up against the transmisogyny she experiences. it's extremely difficult for transfems to get to a point where they can realize who they are, because everyone and everything around them encourages them to stay a man.
contributing to this environment is not a neutral action. it is just as much of an influencing force as truthing* is. if you talk about how nice it is to see cis men feeling comfortable in their masculinity to occasionally express femininity, or complain when people say that a certain person could be transfem because it's pressuring them, you are also putting pressure on that person. you're pressuring them in the same way as the rest of the world: to stay in the closet, to stay a man, to not consider transfemininity as an option.
you don't know for certain whether someone is a closeted transfem. if you're proudly proclaiming that you like them just the way they are, that it's okay to never cross the line from ally to he/they nonbinary to explicitly transfeminine, you can't be sure whether you're contributing to keeping a trans woman in the closet or not.
that's not to say there's a right answer all the time. it's an extremely complicated issue, and in certain cases truthing* has obviously done more harm than good. but there are also instances where it has helped. it depends on who's doing it and what agendas they might have. my point here is that it's nuanced, and pressure goes both directions, and one of those directions is also enforced by our transphobic society.
*i use the word truthing in this post because it's an easy shorthand, but i don't consider everything it describes here to actually apply to the term. sometimes "truthing" is simply letting someone know they can be trans if they want.