IMO, the SV mindset, VC and big tech aren't interchangeable in that way.
Sequoia Capital, the 900 lb gorilla of VCs reportedly had $102B in funds/assets in 2024. Apple just had $124B as first quarter revenue and had over $200B in cash reserves after a $30B stock buyback. I don't know the size of the funds Vance oversaw, but I bet dollars to donuts, the scale is far bigger at big tech.