"Starting a company is probably much better achieved by studying something technical or going deep into a problem space and seeing a problem there, not a generic "entrepreneurship" curriculum."
I think this is beyond bad.
The #1 thing anyone could ever to do study entrepreneurship is to do 'case studies'.
Liteally just learning/observing how they work - the nature of founding, structure, power relationships, what debt and equity are for.
Learning 'how a VC firm' operates, and indeed how other kinds of investment bankers work is golden.
HBS is almost a glorified 2 years of basic concepts + 'a lot of case studies'.
Learning how IBM, Standard Oil, Apple and a host of companies you've never heard of operate is deeply enlightening.
The 'Naive By Design' approach by the YC people is almost toxic.
There is definitely some insight in it - that 'seasoned executives' are probably worse at starting small companies in many ways, but, understanding why that is is really important. It has a lot to do with risk, the kinds of things CEO's of established companies are good at etc..
It's as absurd as saying 'Don't Learn Nursing By Studying Nursing - Just Do Music and Engineering'.
Doing 'projects' however, is a wonderful idea.