Care that is fully available to someone assigned male at birth is not available to someone assigned female at birth and vice-versa. The sex the state identifies you as having is used as the only basis to deny certain services and care. These antitrans bills ARE illegal. It's not just that they ought to be. The current law ALREADY bans them and only total corruption of the court systems stops them from finding as such.
Not to even mention the fact that medical freedom and parent choice ought to totally obviate any bigoted and unscientific beliefs about gender even in a philosophically conservative framework. But they don't, because hurting people is not a side-effect, it's the direct goal.