I find the fixation and obsession with definitions to be divisive, distracting and focussed on othering and alienating people. I feel that the energies devoted to it are counter-productive and will not achieve anything of real benefit to any of the players involved.
We know now that several countries have introduced more relaxed forms of gender self identification, and that these have been in place for many years and there has been no demonstration of detriment to women in these countries.
We even have a more controlled example of how self ID / nondiscrimination laws operate in practice, when UCLA examined how different locales in Massachusetts fared in terms of police reports of assault and privacy violations depending on the locale's approach to transgender inclusive public accomodation laws. They found no link between trans inclusive policies and bathroom safety.
williamsinstitute.law.ucla.edu/publications/ma-public-accommodations/
www.nbcnews.com/feature/nbc-out/no-link-between-trans-inclusive-policies-bathroom-safety-study-finds-n911106
I am on board with people being able to self-identify, and if the identity of lesbian feels like the best fit to that individual at that point in time in their life who am I to say otherwise. I am not the creator and author of definitions, none of us are, and no one person or entity presides over their use.
Language lives and terms and definitions expand, there is nothing new here, that is simply how language operates, as history has shown us for millennia.
I have been part of lesbian social groups for a couple of decades; there has been no massive influx of trans lesbians, if anything more recently it is going the other way; we are seeing a lot more engagement with younger non trans lesbians currently. I have never known any safety concerns over trans lesbians present, but we have certainly needed to speak to some non trans lesbians about their behaviour. And that is what we should be focusing on, any concerns with an individual's behaviour, not our own ideas about the legitimacy of someone else's ID. The fear mongering and moral panic is misplaced.