Since recruiting is tougher, IBEW lineman shops go straight to double time after hours, pay full days for working half, and sometimes feed people after work, among other things that inside shops will never provide.
The saturation of Inside wiring applicants makes them bottom feeders of the IBEW.
Lineman shops sub-contract for utility hazardous duty work, and use inside wiring travelers as groundmen to jackhammer & dig 10ft holes for power poles.
If groundmen, in Basic military style training, don't like digging thru rock, mud, & clay, working during lighting storms to repair downed poles, or won't be recruited, lineman shops won't keep them around.
Traveled 600 miles for work at a lineman shop after inside wiring apprenticeship was terminated. Enjoyed digging & jack hammering, but freaked out when lighting flashed overhead. Supervisors told me if lighting hit close enogh no one survives on the ground or on the poles.