This has happened to me frequently at my current company. I get pulled into a meeting about something that I have no context on because it touches my area of expertise, and the discussions have apparently been stalling out. I brace myself to be the idiot. I'm going to waste everyone's time asking questions that everyone knows the answer to, and I just got looped in, so everyone's going to feel like they need to walk…
This works and should be encouraged if you are indeed very smart and very quick, typically introverted and are actually going to be rolling up your sleeves to pitch in.
This approach is painful for everyone else and should be discouraged if you are a very extroverted and very non-technical person with no plan on actually helping out whatsoever with the actual execution on solving the problem at hand and really are only contributing to look smart in front of any leadership who happens to be in the room.
Definitely be aware of the Dunning–Kruger effect - which is a cognitive bias stating that people with low ability at a task overestimate their own ability, and that people with high ability at a task underestimate their own ability.