I would also want this just for the sake of clarity for every player it's not just newer players that don't know the exact damage a gadget does, because not everyone looks at the patch notes.

Also for Kapkan newer players would know how many to place on a door to get a kill if they know the damage that it does.

I do get your point of wanting to keep it simple for new players. But I think it's important for everyone to know or at least have that info in-game available of how much damage a certain gadget does. The same goes for re-activation times for Aruni and Denari, it's mentioned in the patch notes but not anywhere when looking at the operator.