If an extension ladder's handy and the first limbs aren't 40'+ up (as with some local pin oaks), we have been known to make use of it for initial access, to save on some hip thrusts. But not for working off of, typically.I call it taking the stairs. If I have a bunch of trees to climb, and can reach the bottom limbs by 25' (well 30', standing atop the ladder), I just throw a line, set a climb line, and have my groundman move the ladder to the next tree when I'm off it, into branches. Often times, I can just climb off the ladder and start working, not needing to go higher, if its just canopy raising. Less body strain. Saved me climbing hundreds of trees.
Ladders are not all wrong, certainly not all right. Like any other tool, you have to know when and when not to use one.