I would certainly disagree with this statement. Some of my best bucks
have come from stands in the thickest areas. I
always cut 4
shooting lanes (in every direction) out to my maximum distance. This
usually means
hours of cutting small branches, trees and
major limbs on other trees. I then paint all exposed 'cuts' with
black spray paint and drag all severed tree, branches and limbs
75-100 yards away.
Last week I spent 17 hours working on the same hedgetree. I had to
climb 6 other hedgetrees to open up lanes. Obviously this type of
work must be done during the off-season, but it pays huge rewards

.
I don't.
I killed my biggest buck out of a tree I had to jump to reach the first limb. Wiggled around like a monkey and stood on the lowest limb and leaned against the trunk until he walked under me. Had to be careful not to shoot my own toe off.

If I've got my Leatherman and a weapon, I'm ready to walk out the door. If a guy's not careful the work can over shadow the job.
If I'm going out to spend hours cutting wood, I take a chain saw.