The article basically boils down to 'if the startup can't support you fulltime, it's not profitable'.

If you still have to be a consultant to pay the bills because your side project isn't making enough money for you to quit, don't run around telling people your 'startup is profitable'.

Speaking as someone who has done the side project thing, I was never happy having to work a full time job when I wanted to be full time on my sideproject.