The problem isn't ITT, it's that people think some school (or ANYONE ELSE) will make you successful.
Eh, yes and no.
You make yourself successful. Only you.
...and mostly no. You have to take advantage of opportunities, but you don't create opportunities by yourself. It's a group effort. Sometimes, others work against you, whether intentionally or incidentally. ITT deliberately defrauded students. Willful fraud is wrong because we know that it's possible to take advantage of people, and when that happens it harms society. It's expensive for all of us when people's lives collapse.
If you go to a school it's reasonable to expect (if not assume) that you're being provided useful education. It might not be moneymaking in itself, but if they promise that it will be, then it had damned well better be. If they are promising job placement, then they need to deliver. If they don't, they're committing fraud, and they rightfully should be held accountable.
Tech schools are mostly garbage, which is sad because if they were any good, they'd be great things. Being immersed in a learning environment solely with other people studying the same sort of things you're studying could be a massive boon for some people, and in some situations. Alas, they are mostly garbage, and you'd do yourself and your community (and by extension, your country) more good by simply going to a community college. They have their flaws to be sure, but they are still better than technical schools on average. They're a fairly poor place to get a good quality education and a degree on the same schedule, because good educators come and go from them somewhat irregularly, but a lot of them have fairly fantastic programs of various types — especially in the applied arts.
The problems with ITT tech equally apply to pretty much any of these technical schools, and they're pretty much all the same deal although they are not all equally sleazy. The automotive institutes are very much the same story; for less money you could attend a community college and actually get a legitimate degree along with a pile of ASE certifications, while learning from people with at least as much experience as those teaching in the purely for-profit technical schools. If you want to become a smog technician or a master auto body tech you don't want to go to a tech school, as they will rob you blind. But you can bang the former out in a couple of years (starting from scratch) and the latter out in three or four and for comparatively very little money by just going to a CC.
We all need help in our lives. Apprenticeship used to be popular, schooling still works... and sure, trial and error is a thing, but let me tell you, it can be more expensive than just going to school.