I try to (except from here I guess). I feel like a lot of political discussions here lack any nuance, and are often very US-centric. I’m moderately left wing myself, but I still often feel like I have little in common with the sometimes extremely left viewpoints here. They are usually also seem to be defended in a very black and white way. If you don’t agree you’re quickly deemed a fascist or nazi.
Honestly, I feel like online discussions often don’t really achieve anything. Differing opinions are downvoted and often met with name-calling or accusations. I’d rather discuss in-person with friends and colleagues across the political spectrum, that tends to actually lead to a friendly sharing of thoughts rather than the unsatisfactory hate spewing you get online.