You have many rather strong posts, if I may, but on this, I fully agree with you. I also agree with the poster you quoted...
Based on what I'm saying this? I have written many times that there are many entrepreneurs in my wife's family. None in hospitality, never have been. They are mostly in real estate, being landlords and building and such. In a small scale, we're not talking about anything fancy in terms of company size.
However, in the past, principally my wife's sister and her family, have operated many businesses, also small restaurants or cafeterias if you will. They have all been financially successful. However, there is an amount of work behind the scenes you cannot imagine, stress, hurdles, you name it. They are not doing this anymore as they had the change to move to real estate. Best decision ever.
My own dear wife was operating her own smallish business in clothing when we lived in the DR. She was very good at that. However, running a business like my wife's sister did or my wife did, requires deep understanding of local things, usually of which none or very little is "official" information of knowledge, but you have to just know how to do things. You have to be respected by your clientele, otherwise it just does not work.