30 years ago you needed PG / YC to have a startup. Hardware was expensive, bandwidth wasn't ubiquitous, there wasn't a massive breadth of libraries and lessons online of what to do and not do.

None of that is true today. And though its is possible to build another unicorn there is not a really good reason to do that any more.

Learning about taxes, business structures (CoOp's any one), HR (how not to get sued, how BAD hr means the IRS comes to get you), reading a cap table, reading a contract, accounting are all skills that a solid tech team needs to "build a business". Marketing, Customer acquisition, Customer retention, Customer Service are all places where most recent grads might not have the skills to "do the needful"

LLM's have compressed the early build out stage. The tech portion, getting from zero to one is now partly trivial. If you are going to build out a niche business that does 1-10 million ARR now is the time. Thats not a product at a scale the at PG and other VC's are really interested in, but it is possible to run a project that size with a very small multi-talented team. They need all those other non technical skills to make it happen.