I've never really understood these comments. As someone who's founded two VC-backed companies and raised millions of dollars I have to tell you that the parts that bother me really aren't "working tirelessly and thanklessly" for the benefit of my "patrons" who aren't taking any risk. I actually really like my investors. Many of them are effectively startups, too: most funds, especially new ones, have to work hard to source and get into good deals and demonstrate a return so that they can raise their next fund. That's far from guaranteed. Those investors are as much entrepreneurs as we are, just in a different sector. I'd say probably 70% of my investors fall into that category.
Occasionally a founder will get screwed by a VC. It's happened to people I know. In retrospect it's very rare that they didn't see it coming, and usually it's more complicated than just "investor screws founder." Investors have to work with the small ecosystem of each other and new startups on an ongoing basis. It's an iterated game and truly bad behavior gets you shunned. It really does.
It's actually more often that I hear that people wished they'd raised VC. I have several friends who have bootstrapped successful multi-million companies who look back over how they got there and the challenges they face now and wish they'd raised money. Yeah there are a lot of great small businesses - and bootstrapped startups - that do well without getting investors involved. But I can tell you first-hand that investors can really add value and drive entire fields much faster than they would have otherwise matured, and at the end of the day come out successful in real terms.
Founders have ways to diversify. I've executed minor equity swaps with a few friends to create a portfolio of my own. It's more "downside protection" (hopefully) than designed to replace the possible returns from my own company, but those investments have actually done really well.
It boggles the mind that in this corner of immense wealth creation and the freedom to do really whatever we want to do - if you don't want to work on something, don't start that company - what people fixate on is "investor vs founder."
Just go do it. A lot of the stuff you wrote about above really aren't things you worry about.