I don’t doubt this is very common among trans people with left leaning parents. So many cis parents hear about the woes of trans people and are scared when their child comes out to them, sometimes just hoping they go back to being cis so they don’t face discrimination. They don’t associate it with joy. My mom in particular has tried very hard to encourage me to love my body through diet & exercise. Hearing I want to change my body (even if it’s just chemically) makes her think I hate my body.