Well younger lesbians are even more supportive of trans people than older lesbians (who are also overwhelmingly supportive of trans people). And I use them as examples because I keep hearing from straight people what a lesbian really is, and those same straight people insist on either dismissing my experiences or claiming I'm not who I say I am (which is fine, by the way, any of us could be anyone).
So what we can do, rather than relying on anonymous internet posters is look at what prominent, verifiable lesbians, are saying.
I can see what you're saying, and I do accept that we can only listen to the voices of those who are actually talking.
However, I think that what you might not have picked up on from your social circles where you're seeing all this vocal acceptance of transwomen as women and therefore as lesbians, is the not insignificant number of the lesbians who feel that they can't speak out on this issue for fear of being branded transphobes if they do.
I think that while women are always on high alert for any risk of social transgression, lesbian women tend to be even more vigilant about social cohesion because of the risk from men who resent them and because their community is already so small and marginalised. So I think that lesbians who don't subscribe to gender ideology are understandably particularly reluctant to say so publicly.
I don't consider myself transphobic and I respect and have compassion for transwomen, but I don't accept that they are women and I don't date them any more, following several awful experiences that I definitely don't want to repeat.
I have been on several tinder-style dates where the person didn't tell me in advance that they were trans (it can be very hard to tell from a few carefully curated still photos), and their view was obviously that trans women are women and I am a lesbian and therefore I would only have a problem with that if I were a horrible transphobe.
And I guess it's not like when a transwoman is dating men and they have to worry about the guy getting violent when he finds out they're trabs - why would a 6' transwomen be worried about a little 5' biological woman getting annoyed with them? It's for me to worry about my safety in that situation, not them. And I don't get the option of declining as they unilaterally decided that I didn't need to know they were trans and that they know they're harmless, so why would I ever think otherwise or decide not to take the risk?
And to be honest, I've found that my issues with dating transwomen start way before the bedroom - the people I'm dating are late 30's at the youngest (often older) and have been socialised as male. I find it really hard to sit there on a date having just found out my date is a biological male because they had a different definition on "lesbian" and "woman" from me, and then hear all about how they believe their experience as a woman is akin to mine. I have been on dates with ardent male violence apologists, people repeatedly making incredibly patronising middle aged men comments to me, coercing me into condoning their caricatures of womanhood, having to 'protect' the transwoman by going downstairs to the isolated pub loo with them so that they don't get attacked by the other biological males in the pub, and so on.
I have had quite a few dates with transwomen and transmen (all from saying I'm a lesbian) - while the transmen have different issues (violence is one when they are on T, IME), I have found that it is always exhausting and not something that I would seek out from dating, not specifically because they have a penis but because they are biologically male and have usually been socialised as such, which simply doesn't work for me as a lesbian who is exclusively attracted to biological women.
Also, I have had so many problematic experiences with gender ideologues when dating that aside from not being prepared to date any more transwomen because they are biological male and I am a lesbian, I am also not prepared to date trans people or gender ideologues more generally as we are incompatible on philosophical grounds and it simply wouldn't work without one of us having to make untenable philosophical compromises.
I don't know whether you're in a relationship, but I do suggest you (safely) date some transwomen if you can as it really opened my eyes and before that I was very vocal that transwomen were women - dating them made me realise that simply isn't true in the slightest.