Almost all of them require training, so the first paragraph of that article is misleading and they even mention the requirements themselves:
ZipRecruiter analyzed listings to identify jobs that can be done part-time with few or no starting requirements and ranked them by average hourly wages
- Craftsmen include specialists like carpenters, metal workers and glass blowers. Certificate programs, trade schools and community college offer training.
- Sales specialist
- QA reviewers can work in a wide range of sectors like food safety, pharmaceuticals, manufacturing and software.
So, first you need training, so it's not like you have no clue you start working, you must go through training and learning, and if you're not good at it, then you don't get the job, just as QA, it's not like you go in the first day and they hand you a food bag and you're delivering pizza, you need to know how to do it and you might be a total wreck so you get kicked out before actually working even 1 minute.
As for the "sale specialist" how the hell can one be a sale specialist when he has no experience in sales whatsoever?
In order to be a sale specialist you must have at least basic knowledge so this is more like getting a better job than your past one!
"Few" requirements, to be a specialist, lol!