The thing is, I feel like many people just add whatever they think and want to say to a conversation no matter how relevant or irrelevant it is to the current situation. In the end, I feel like most people on here are civil enough to not be mean-spirited towards one another unless they're talking to bigots and stuff.

I struggle with this quite often too - especially when it comes to topics that can be quite divide and polarising - but I always feel good once I do step out of my comfort zone and post away. There's usually bound to be at least a couple people with whom your comment resonates with. Give it a try maybe - you'd be surprised how well it can go :)