You are spot on - polymath and pareto is exactly what you need to be a good entrepreneur. A practical example of how this is true: I started commerce at uni - didn't really like it - changed to law - didn't really like it - changed to mining engineering - kind of liked it and decided it was time to finish something, so finished it and became a mining engineer. Finished commerce and law part time while working as an engineer - law in particular was much more interesting while working in the real world. Then got bored with technical engineering work. Long story short after some drifting and travel I started and have been running my own company for the last 3 years that buys and sells ore deposits. Engineering lets me understand whether a deposit is any good technically, commerce lets me figure out how much it's worth, and law helps me negotiate the details of the transaction. But despite my degrees I'm not a qualified accountant, nor a qualified lawyer, nor a certified engineer. I understand 80% of what is going on in each of those areas, and for the bits I don't get I bring in a specialist consultant - ie a law firm, an accountant or a technical mining consultant. If I didn't have a general background in all three disciplines but, say, specialised in only one of them, it would be prohibitively expensive to hire specialists to cover 100% of the remaining 2 fields. Alternatively, if I waited until I understood 100% of all three fields, I would never have got started.