I guess I don’t see talking to people in your life and talking to people by way of politics as mutually exclusive. In either case you’re talking about ideas in hopes they spread. Talking about liberty ideas within the realm of politics isn’t any more immoral than talking about those same topics with your neighbor.
Now if you want to make an argument that talking to people through politics is not the best use of time relative to other things you could be doing, then I think you’ve got a much better argument.