Because employees that you interview are different from investors.
At a minimum, you are going to interview a lot more engineers that are tempted to divulge trade secrets than investors.
At a minimum, you are going to interview a lot more engineers that are tempted to divulge trade secrets than investors.
There's a huge difference between pitching and due diligence.
Also, it's reasonably common to show a pitch deck to 100+ potential investors. How many series A companies interview 20 engineers, let alone 100?