Wikipedia defines common sense as “knowledge, judgement, and taste which is more or less universal and which is held more or less without reflection or argument”
Try to avoid using this topic to express niche or unpopular opinions (they’re a dime a dozen) but instead consider provable intuitive facts.
It’s extremely useful, because it’s an index to all the known things that might be useful in a given situation. The point is not to assess all of them, the point is to not miss ones you’re unfamiliar with that may be important in your situation.
I imagine psychologists can do more with it, but in practice the main thing I see formal fallacies used for is as something to shout during a debate, and it never seems to convince anyone.
If you can catch yourself using one, that’s good I guess.
I work in the risk assessment space, so they are kind of critical to be aware of, for me :)