People do it. I think the time and learning resources it takes to do it all yourself is probably not worth it for a company trying to make it big, especially if you stack your BV inside of a holding inside of a stichting to get something similar to the OP tax-avoidance-cum-risk-reduction strategy.

The risk of making a mistake and getting hit with a huge fine, as well as all the time wasted on crunching numbers and reading tax code, probably makes it very difficult to justify doing it yourself if you have a profitable business. If you do not make the money you need to make paying an accountant make sense, I think setting up a BV would probably not be the best approach.

Getting things like payslips right (you have to pay yourself a defined minimum wage and that means paying income tax and getting all the payslips correct if you set up a BV) may seem simple, but there's a reason companies pay good money to have that all taken care of. Just simple things like the possibility of a 53 week year can trip up someone who is just starting out.

But at the end of the day, plenty of people do their own paperwork, deliver the taxes themselves, and file the yearly required documents. It's neither impossible nor illegal to do it all yourself, just often unpopular.