I would like to submit a reason, which is neither logical, practical or even rational, but nevertheless may be closer to the truth than we would like to admit: The NFL went to wide stripes, we (for the most part) went to wide stripes; NFL went to black pants with a white stripe, we went to black pants with a white stripe; NFL switches positions at half time, we ............. (fill in the blank).
Ah, while the basis of your theory is generally valid, you have the pants issue incorrect. The NCAA went to black pants with white stripes for "cold weather" (only) in 2010, then full time in 2011. The NFL did not change to black pants until sometime after that - perhaps as early as 2012. I recall thinking, "This is the first time the NFL officials have followed the NCAA officials in anything."
But, yes, generally speaking, ideas and concepts tend to flow from the NFL to the NCAA to HS. There is a reason for that. The NFL is constantly evaluating and trying new ideas to improve officiating. The NCAA does this, but to a far lesser degree.
The NFL went to 2" stripes many decades ago (probably over 40 years), when they started to get so much TV exposure. The 1" stripes were hard to see on the TVs of the time, and
probably created moire patterns, too. Took a long time, but the NCAA made the change for the same reason. The 2" stripes look better on TV.
There is a reason the NFL switch sides at halftime, and I believe it was done to give the sideline officials 'equal' exposure to the teams. The NFL has no issue with seeing the chains, etc. The Power 5 conferences probably don't really have an issue with seeing the chains either, but the NCAA includes all of FBS, FCS, D2, D3, JCs, etc., for some of which it may be a problem.
Robert