Different people draw different perspectives from the posts they read.
I took the inference that the risks associated with running a business were being discounted out of hand and distilled down to tax avoidance.
I suppose discussing business with someone whose focus is tax is similar to the adage that everything looks like a nail to someone who is holding a hammer.
(As @Burns-bass said, "Steve is going to view this through the lens of a taxman.".)
Running a Business has many risks over a being PAYE employee and simply focusing on the tax alone is meaningless.
(I'm a PAYE employee, FYI; I don't need the hassle of running a business and the risks associated with complying with legislation, running costs, insurance, sickness/unavailability, tax investigations, ROI, etc.)