Maybe. I don’t think most people with math/physics PhDs have done much with machine learning or the specific tech that companies are looking for, so that’s why so many of these bootcamps popped up. The people in my social circle who did bootcamps to transition to jobs from PhDs seemed happy enough with them, but that doesn’t make all bootcamps equal. My info is also 5+ years old, so circumstances may have changed. I do believe you that there are a lot of crappy bootcamps now.