“so sue me” is a relatively common saying meaning you think you did nothing wrong so you’re challenging the other person to take you to court over it if they really want to litigate what you did. (Not literally ofc, it’s a saying)
Sue is also a common name for a girl in America so walking into a sex change clinic and saying “Sue me” is a funny way to ask for gender reassignment surgery.
It’s sad that it’s true. Therapists are in high demand, and part of the reason we need more therapists is that about 1/5 of current therapists are basket cases in denial who use the idea of therapy to fulfill their own desires to control and manipulate others.