Sometimes people want to convince you to do things that you don’t want to do, and which aren’t any of their business.
Sometimes people want to argue with you about politics, and aren’t willing to have the conversation end unless you convince them or they convince you.
It’s ok to decide you don’t want to have those arguments. It’s ok to unilaterally end that kind of conversation.
You don’t have to convince them you’re right. You don’t have to convince them that you’re right about the issue in question, and you don’t have to convince them that you’re right about not wanting to discuss it.
It’s ok to say no to conversations you don’t want to have about things that are entirely your business.