Lawyers (of the company) typically don't get involved in reviewing pitch decks for accuracy at least in the early stages. And even if they did, the lawyers only

Lawyers (of the company) typically don't get involved in reviewing pitch decks for accuracy at least in the early stages. And even if they did, the lawyers only know what the founders tell them. Additionally, lawyers typically avoid asking probing questions of founders. especially if there is risk that the answer they get may be troubling - it's much easier to defend and advise a client when you're not explicitly aware of every dirty secret. But you're not totally off base. It's absolutely the responsibility of VCs to do their own due diligence. VCs usually are investing other people's money. It's not a good look for VCs to invest in scams, so VCs typically do some degree of due diligence (which could be virtually zero diligence at seed stage / Series A, to quite a lot of diligence at later stages as the amount of money involved increases).