I'm against bigotry because it is stupid, it holds everyone back, it's always based on nonsense, and frankly I really don't gibe a flying fuck one way or the other what someone else does if it doesn't directly effect me.
Not self interest. Self interest is how this fucking mess starts.
Remember how they wanted to ban abortions, and now women who wanted the baby but have a medical emergency, might not get the medical care because doctors are afraid of accidentally "killing" the fetus.
What makes you think that they won't fuck up the laws against trans people.
(Of course, there are better arguments against transphobia but we are talking about selfish reasons)