YC Startup School maybe is 90% marketing. But in business school, you learn more accounting, business law, economics, operations management, decision-making. And more thorough coverage of finance instead Series ABCs.

I got something really more valuable beyond these things. Observing how political organizations get. I was a programmer for 9 years before joining an "Elite" MBA program in India and the level of politicking among a batch of 75 people was mind boggling. I see that now in my current role at work and am better prepared.

that's a fair point, however Peter Drucker the famous Management Guru said "Business has two basic functions - marketing and innovation" so all the other subjects don't really matter in the larger scheme of things.

Much like the plumbing in your house doesn’t matter in the grand scheme of things.

It doesn't matter to me as I personally don't bother and outsource the job - that's the point.

Usually I watch a YouTube video or two about what a plumber probably needs to do so I don’t get totally ripped off.

If a business does not have any understanding of the competencies mentioned in parent, they are at a huge risk of being ripped off by outsiders.

Then you have a "trust" problem which is another matter.

That is pretty much the nature of the beast with contractors; not another matter. If you don’t understand what they’re doing at some level, they’re probably just using you for billable hours. If for no other reason, they have other more demanding clients that actively manage them.