Going to a trade school is the best idea if a student is actually talented in that sort of area, for others (like me) it could easily be disastrous. Like going to university, it all depends on the student. University should be a serious, considered decision, but it shouldn't be viewed as solely a means of getting work. If that is the case, then perhaps uni life is not the best idea.
Speaking as someone who is poor, underemployed and heavily in debt (hello post- and undergraduate degrees), I wouldn't change going to uni. It helped me find subjects that interested me, subjects that I was extremely good at, and it also helped me to see the world (in some cases quite literally). I am able to think critically about the world around me and communicate my ideas effectively, which was helped in part by my uni years. As a minority and 1st gen student, uni helped me to think big and move beyond the small town I was trapped in, which helped me to be fearless when it came to seeing the world and switching countries.
Also, my job may not be great now, but it will get better in the future. Work and money are important, obviously, but it isn't everything. Uni showed me that my education never stops, that I have to continue learning and exploring. It's helped my development into being a productive, thinking worldly citizen, and that makes it all worth it to me. It even led me to the career path I'm trying to get on now, helping disadvantaged, minority students expand their education and critically think about what it means to be a 'global citizen'. If I hadn't gone into higher ed, I'd probably have more money and a stable job, but I wouldn't have personal or intellectual fulfillment, I wouldn't have my husband (who I met as a student) and I wouldn't be in England.