Ask HN: Do founders get honest feedback on their pitch decks?

I've been through a few VC meetings and noticed a pattern: friends and advisors are too polite when reviewing pitch decks. They miss the brutal questions VCs actually ask.

Thinking about building a tool that generates realistic VC questions based on your pitch deck - the skeptical stuff like "Your TAM math doesn't add up" or "Why can't BigCorp clone this?"

Is this actually a problem other founders face? How do you currently get honest pitch feedback before investor meetings?