I think those people need to be broken down proper before there's any chance of salvaging them. Living with one of those, this is the mental tape that plays in my head whenever they mention anything "startup".
"Hrm, great, but what have you been smoking. Your business idea sounds like something a 5 year old drew in Crayola after watching an episode of shark tank. Your equity won't buy you a roll of single-ply toilet paper if you had a coupon. You're starting a startup, which is the most blunt force trauma way of getting paid market rate, and your (business) degree...well, it's worth less than your equity . That network you built whilst doing case studies on Apple is going to help you as much as a lifeboat in the Sahara. Only thing you have is a bit of hustle, and there's people running fruit-stands in shenzhen that have more of it than you. Sit down, shut up and do things, and maybe in 5 years you'll make a decent founder."
I mean you'd hope that it'd stick, but it doesn't. Nothing more infuriating than people talking the talk whilst you're walking the walk. My reading list is longer than your business plan, so fermez la porte and do stuff instead of distracting me whilst I'm trying to work.
It's really weird.
/rant
I'm aware that it might be angry and off-topic, but I thought some parts fit the "straight outta b1zn3zsk00l" people.