I really should have clarified this because it seems like a contradiction for me to state that down voting is bad, and to say that when you see something worthy of a downvote, downvote and move on.
When I say worthy of downvote, I don’t mean a disagreement. I’m talking about people being obviously toxic. If malicious people want a reaction, giving it to them is not productive.
For example, if I see a post about plant based meals, and a comment states “I’m not convinced that this is really helping the planet, I don’t see a problem with eating meat” - then engage politely.
But a post like “fucking vegans lol, I’m going to eat 2 steaks tonight” is not worth replying to. Downvote and move on.