Gordon Ramsay is perhaps a perfect example of an entertainer that people mistake for an expert.
His job first and foremost is to entertain. That’s what he does.
Many people will jump to defend entertainer “experts” like this because they are actually good in their field and they share a lot of accurate advice. They’re making an effort to do the right thing and share the correct advice most of the time because doing anything too obviously bad too frequently would shatter the illusion.
But entertainment comes first. If it comes down to being pointedly correct and consistent versus being entertaining, they’ll choose the latter when they can get away with it. Praising a terrible grilled cheese is a perfect example.
This happens a lot in the workplace, too. Every company I’ve worked for has accumulated a few people who were very charismatic, loud, and entertaining, but everyone who knew the subject could see they didn’t know what they were doing. These people can persist for a remarkably long time, coasting on charisma alone. My clue that it’s time to leave a company is when those people start getting promoted and put in charge even after a year or two of consistent underperformance. Fortunately the better companies I’ve worked for have eventually caught on to the bullshitters and pushed them out, but it can take a painfully long time.