Wall street jobs are super stressful. Stressful enough that people not properly suited for it might kill themselves.
Programming jobs are mentally taxing. Mentally taxing enough that people not properly suited for it might become depressed, decide that they're a failure, and/or have a very hard time.
Jobs in science require math skills that are hard / expensive to acquire, which one might never master or become good at.
Jobs in law require very expensive educations, passing an extremely hard bar exam, years of work for low pay and long hours, for a job that only might prove to be good paying after the fact.
Becoming a doctor requires expensive education; Surgery require that plus steady hands. Etc., etc.
Jobs and trades have different pros and cons. I agree that yes, trade skills are physically demanding, but having done them before, they aren't that physically demanding. It isn't the same as being on a prison chain gang, and an average work day is less intensive than a couple of hard hours at a gym.
Obviously, this varies from trade to trade, but the I agree with you that the idea that trade skills should not be considerable because they require physical effort is fairly silly, unless the suggestion is that we should all eschew all forms of work, because every job has some sort of down side.
I don't know of any high pay, low skill, low stress, cushy jobs in the world. If someone knows of one that doesn't have some other downside I haven't listed, feel free to let me know. Email address is in my profile.