I don't necessarily agree with the thesis but the venture capital model is a bit weird in ways that explain why a business/investment person would do that.

From my understanding 'Strange things most people don't care about' may fail (and indeed, probably will fail) but they have also been major lottery tickets in the past. When you have enough money to throw around 'buying every lotto ticket' has a record of paying off better as a strategy than taking a 'rational' approach of only investing in those which you have strong fundamentals in. It takes a stupid amount of money to diversify in such fields so it isn't for everyone of course. Tech just has the best record for it so far with highly scaleable businesses.

They just care about the returns. If instead of what we know as 'tech' the big field was, say, genetic engineering or for the sake of absurdity - literal magic. If it somehow scaled better they would throw their money at that.