I think maybe it's the case that the VC's biggest competition for top talent and good ideas are from the innovators that they hope to invest in.
If they encourage a thousand lifestyle business bloom, one might turn into a boot-strapped "unicorn" that didn't take their money, so it's in their own interest to make lifestyle businesses seem like a terrible idea.
The more talented people are convinced the only way to start a business is with VC, the higher a value VCs can extract from talented people. If we actually had more socially acceptable options, more folks would have the leverage to walk away from the table and shove the VC's non-competes, non-disclosures, preferred shares and meddling board seats in their face.