For example, if Google says they'll acquire you or run you out of existence, couldn't you always go to VC (ie. any alternative of Google) and say:
* Google wanted to acquire us because they like our team and/or the idea. You can either buy Google stock, or make an investment in us.
This at least gives you some out between the "take our investment or die."
But maybe this wouldn't work in practice for some reason? I'd be curious to hear. It just seems the market can't reasonably be in equilibrium when everyone is forced to take money _at the mere threat of_ producing (or investing in) a competing product.
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[Edit] It's also important to keep in mind that often cash is much more fungible than the execution of an idea. I can put 1MM into your business, or a business that I think will put _you_ out of business, but if I don't trust that team or they can't execute, that 1MM may as well be toilet paper.