Also I will never forget when I was an Apprentice back in the early 1960s, and the LAMEs went on strike, we had to work with these PEs who were replacing the LAMEs, and we Apprentices had to show these highly paid PEs what to do, they couldn't even do things like change bulkheads etc.
It doesn't surprise me in the least that they couldn't change bulkheads - it isn't their job. I'm reasonably sure that if you sat a typical LAME in front of a simple first year Engineering Mathematics exam, they'd struggle as well.
PE's and LAMEs do two different jobs that complement each other.