I don't think many hams are going to be buying 1,000 foot spools for a mobile installation. Not only do smaller rolls of cable come boxed but also sealed in plastic bags with instructions on the outside such as "do not bend
!" I guess if you buy commercial length rolls they figure you might know enough to install it correctly and that instructions are not necessary, or are they?
As to your second comment, there are other forms of radio communication than ham radio. I have been using many different services since I was 10 years old, commercial for our family's agriculture business, marine for our boats and CB for other local communication. I addition, I have 25 years of public safety communications under my belt, so what is your point?
I have cheap Radio Shack 8X installed on an exposed stud mounted antenna bolted to a tool box. It has been on there in 100 plus degree Florida heat for almost five years now with no problems. It has not "migrated" anywhere. So what is the difference? The difference is through good planning I made sure not to bend
, pierce, cut or abraid the coax. If you install things correctly they work well, if not, you get bad results.
All these eHam.net "experts" and not one knows how to properly install something simple like coax. Sad, isn't it?