I would agree with that for dev positions. But when I was hiring PMs, these types of questions were actually a key part of the interview. The particulars of the answers mattered a lot less than the fact they did _some_ research, and formed a limited mental model of business from which we could discuss different scenarios, tradeoffs, pivots, features, etc ... Major bonus points for them basically turning the tables around and interviewing/grilling me on how we were going tackle "recent announcement from competitor" or "trend in market" and asking good followup questions to dig into how that could relate to what impact they could have.