Nobody said you can't change your party affiliation. For the moment, anyway, we can still choose our party affiliation without applying for a certificate of approval or a license. That might change in the coming year.
I'm still affiliated with the Democratic Party, and I won't give that up. I'm free to think what I want, and choose what political initiatives I want to support, and which ones to ignore.
Think about it. Try something new. You might like it. :)