No, it was looked down upon because the pay to quality of life ratio was much better in white collar careers. It probably still is for the most part. Wake me up when the same people are deciding between becoming plumbers or electricians rather than lawyers or doctors or engineers.
Either way, a Mon to Fri 8 to 5 salaried gig with benefits requiring little travel and no health risks was a comparably better goal to aim for due to the lack of sufficient price premium for the non desk job labor.
Bare in mind, vocational still means "not college bound" == "useless" == "doesn't look good in the US news rankings"
Ive talked to superintendents and they just give me a blank stare when I told them that a great way to get kids to understand the cartesian coordinate system is in machine or woodshop, reading a blueprint, schematic etc. Actually doing the work is better than a word problem. They have no respect for it and this is in the best educated state in the US with supposedly the best school system.
Bottom line, if we are going to build things again, it needs to start in the schools.
[0]https://www.goodtherapy.org/blog/how-boys-learning-styles-di...
Building things has been looked down upon for 40 years because boomers thought it was a step backwards since their parents worked on the assembly line.