Personally, I missed the original thread. However, I would not say that the appraisal was harsh. However, it was very accurate.
Running a cafe is one of the most difficult (and time consuming) things that you'll ever do. Few people really understand the amount of time and capital required to run a food oriented business to PROFITABILITY.
For the record, in my career, I have returned two money-losing operations to profitability (in my younger days) but 16 hour days and 80 hour weeks were not uncommon.
And do remember not to repeat some of the goofy mistakes made by a coffee house owner locally. The guy was open from 9-5. We was complaining that he had no business. No kidding. I told him that Starbucks was open from 6 am -10 pm for a reason. His response was "If I wanted to work THAT many hours, I would have stayed at my corporate job." Needless to say, the business was gone in six months.