I mean if a transwomen passes, they can just use the women's bathroom and no one would even know.
The problem is most look like incel dudes in a dress. That feels threatening to most real women and makes them uncomfortable.
When it comes to trans issues, folks the left has made a series of changes over the last 10-20 years that have shifted things too far to the left. When it comes to trans women/girls in athletics, teaching elementary kids about trans ideology, giving minors puberty blockers, hormones and sometimes even surgeries, and schools requiring consent from elementary/middle school kids before telling that kid's parents they are transitioning at school, there has been a steady march to the left on just about every issue. That part seems clear.
Folks on the right look at this and say "Hey wait a minute, I don't agree with that", because, well, they don't. In return, rather than defending those positions on their merits, the left seems to be relying on a series of deflections.
One of these deflections is "why are you so obsessed with trans people?". This seems fundamentally unfair to me. Are people who disagree with these policies simply supposed to ignore them, lest they be accused of "being obsessed"? Is this just a way for proponents of these policies to avoid having to defend them? Aren't they basically saying "Go away and let us do what we want"? What should I do if I don't agree with what you want?