After NC: Has anyone had success in asking that they go to therapy?

Just looking for insights, but the only way I would ever consider revisiting a relationship with my Nmom and Edad would be if they made an effort and went to therapy.

It’s important to note that the last time we spoke in person was 2 years ago when they showed up to my apartment unannounced. As you can imagine, it did not go well and ended when I asked them if they would join me in therapy sessions. They scoffed at the idea and said “why would we go to therapy?”. Remembering this is so hurtful. Essentially denying any and all wrong doing all over again.

That being said, I’m considering writing a very short letter to them after 2.5 years NC, simply stating:

“Please go to therapy. I cannot reenter the family dynamic as it existed when I was there. If you go to therapy, I’d love to hear about your breakthroughs. If not, do not contact me. Your silence will communicate to me that you do not think I am worth going to therapy. The ball is in your court.”

Thoughts? Suggestions? I’m struggling with how NC is showing their true colors and lack of empathy for the situation. Surely a therapist would help in some ways.