The restaurant industry is a top contender for worst investment of time, money and effort. Wether you're opening a restaurant or want to work in one. Low profitability coupled with high demand on worker skill and efficiency makes sure you can never relax. Yes, restaurant work is highly skilled in order to deliver high quality food at acceptable speed. Restaurants not requiring skills do not offer any career advancement, but top restaurants requiring skills do not offer much of a career either.
Restaurant work is easy to get in to without having to submit yourself to academic humiliation and corporate humiliation, and since good workers are always wanted, you'll always have a job if you show good work ethic, whereas in other industries your job mostly depends on politicizing at the workplace.
But honestly, the restaurant sector I wouldn't recommend for anybody. The only way to expect a reasonable return on your efforts is to have your own place - and then you'll be working for your landlords who'll keep increasing the rent if they see you're being successful, or wasting decades paying interest on a mortgage. And since customers don't accept higher prices, you can't offer higher salaries. Then you start resenting your employees because they won't stay with you for a long time, and you're always rotating the roster.
Or maybe you have the money to buy a restaurant property in a good location outright. But then the question is: If you have that money, why not continue doing the thing that made you that money instead of investing in the worst sector?
Covid was the wake-up call. A huge part of remaining restaurant workers got laid off or put on "pause" without a salary. They realized that they were expendable to the employers and to the industry, so got new jobs and new careers. No matter what jobs they got, it was guaranteed better than their former restaurant job. With the added bonus that you can actually advance in your career and pay when you're getting more skilled at the job.
I don't know what the future holds for restaurants and eating. Maybe more mix-in with show business, so that people have more incentive to visit and don't mind paying a higher price? Maybe people start learning better to cook? It's not difficult. Maybe better quality microwave/air fryer food, in refrigerators instead of in freezers at the supermarket?