[beeeeerp]

Maintenance and operation is a big factor, but engine-outs do happen.

It also seems like you are talking about helicopters, which have a special exemption: https://www.law.cornell.edu/cfr/text/14/91.119

In a fixed wing, altitude is absolutely your friend and gives you more options to land, which equates to a higher probability of finding a nicer emergency landing spot.

And to your point, power lines that are shorter than 199ft don’t have to be on the charts. I could erect a tower off major airways or near an airport to that height without prior warning.