My uncle was a commercial diver in the Gulf back in the 80s, and he'd have given you a look for calling it a helmet. It's like how nobody says they're going to "tape" a show anymore, you just set it to record. The specific words get replaced by more general ones from outside the field, and something about the craft gets lost in the wash.

Doesn't this happen with a lot of tech, where the promise gets more hype than the actual use?

Actually, it's a teaspoon of vinegar, not a tablespoon. Too much can make it taste weird.