Yeah, I put headers over everything
A gable end with proper support I might use 2x4's on edge
---I did this in (3) places on small windows when there was either a 2x6 header within 2' above it or a double top plate
But usually a 2x6 header is a min for me
Just not worth it to save the $10-20 cost of the header
I hear you. My issue was squeezing in an interior bathroom door next to a vent pipe I really didn't want to relocate. At best, the trimmer studs would have limited me to a special order 26" door. My shoulders touch both sides of a 24" doorway.