Being inclusionary isn't costless - historically the marginalization of trans (or other minority groups) gave the establishment / mainstream / cis in this case

Being inclusionary isn't costless - historically the marginalization of trans (or other minority groups) gave the establishment / mainstream / cis in this case peoples power to dictate the material conditions of that group. The marginalization of trans people empowered the rest to drive them to suicide or normalize their abuse. That kind of power dynamic is appealing to sociopaths and other hostile personality types. That doesn't create any economic benefit of course - bigotry in general is an economic impediment. That does not stop its widespread practice, it just means that in macrospect practitioners of hate repress their populaces productive potential and we can hope over sufficient time frames that leads to their own self inflicted obsolescence.