And a population withholding investment capital when those (actually very heterogeneous) tools when they're for unsustainable business plans is better than one in which people have to invest in some business plan to preserve what they have.

It's really not as simple as "investment = good". It's good when it's for stuff that produces value. It's not good when it's invested for the sake of investing and ends up in the stocks of corrupt corporations and shady ventures.