My Dad was a Seabee. What is your point? We didn't need engineers, we needed warm bodies with chainsaws in large quantity. The problem wasn't lack of technical knowledge, it was an overwhelming number of downed trees and downed power lines.
We didn't need semis pulled out of ditches. We needed medium size trees cut up and moved off the road. Yes, an M60 can do this. So how many M60s would it take to move as many trees in a given time as, say
100,000 men with chainsaws?