Robber: “that’s where the money is. What, do you want me to rob libraries?”
VC have money. Spending other people’s money is a frequent pastime. If SoftBank is willing to give you $100m to expand the reach of your IRC replacement, why wouldn’t you take it? Combine this with companies that are built to be sold to one of FAANG (ones that try to solve an actual customer’s problem but mostly just enough to catch the eye of a giant and sell to them) and you have SV.