I think this type of thinking is part of our societal issue
There's no reason hourly wage compensation structures can't be part of career paths.
We need people to do all of the things you mentioned (and more) that happen to have that compensation structure.
There's no reason those can't or shouldn't be careers if people want them to be. I especially disagree with the age segregation there. Why should only young people be doing some of these jobs?
"Grinding up the ladder in corporate land" is a soulless existence to many folks and that shouldn't be the only way to have a good lifestyle and indeed life.
I agree with you that hourly wage compensation structures CAN be part of career paths...and it's far too lengthy for this site or me to type.
But in essence, in the USA, hourly wages equates to a non-career. You're hourly because they (restaurant, retail, gas station, lawn service, whatever) doesn't know if your committed to this line of work as well as most hourly wage jobs in the USA are basically minimum wage. Sure, there are some great hourly wage gigs as a plumber or electrician or appliance retail person and I would argue a good percent own their own business. Definitely. But the vast majority of hourly wage in the USA is really to be a stepping stone...you get your first hourly wage job in your teens, do it for a few years at various places, and do the same if/when you go to college. But within 2 years of stepping out of college (age 23+) you should be applying all 4 years of high school education, 4 years of college education, 8+ years of hourly wage jobs into something that is salary...a job/career/path that gives you a steady paycheck WITH BENEFITS every week. A path to grow in the company whether it's "horizontal" or "vertical".
You're right...we need people all over this earth to pack my groceries or give me advice on the iPhone or help me find a pair of pants or take my food order or help me buy electronics. But those jobs should be BUILDING your customer service skills...BUILDING your interpersonal skills...BUILDING your business skills, etc. You can stay hourly for decades to come and the pay (not benefits and vacation etc) might be good/great or the personal reward might be great.
I also agree with you that "Grinding up the ladder in corporate land" is, in my life, not my cup of soup. I've been an "individual contributor" for a few companies since 1993 and I am still very fulfilled. Being a manager is not my forte. I also simply don't want the responsibility of 5+ other people's careers, sometimes for a measly $5k/year in salary bump. Trust me, for $5k a year ($400/month, $100/week) I will go home with less stress, worry, and responsibility to be with my kids and wife knowing that I did a great job.
I wasn't trying to imply only young people can earn hourly wages...there are plenty examples of retirement-age people working at Walmart and other places but I would argue that's partly/mainly due to their actual need of income vs. being bored in retirement vs. wanting of incoming vs. wanting to feel productive in society. But realistically (in my view), a person should start off hourly in their teens, build lots of skills for 5-10 years, and then figure out how to go "salary" and get piece of mind of a known weekly paycheck, benefits, time off, healthcare, and predictable schedule. There are exceptions, of course in which an "hourly" job/career can really pay well (see electrician, plumber, appliance repair). However, I do take great issue with any-aged person who thinks they should be able to work retail for their entire life and consider it a career or "living wage". No. No. You chose to work at a minimum wage (or close to) job that pays hourly ONLY WHEN YOU SHOW UP, and is NOT intended to support anyone other than yourself. Now you have the gall (or at least minimal intelligence) to complain that the $19/hour job you do for 40 hours a week doesn't cover your wife and 2 kids and all expenses(food, clothing, rent, utilities, car, gas, insurance, fun, vacations, birthday gifts, religious donations, etc.). Those people need a kick from reality.