Imagine the govt provides two transport services, a car road service, and a paved bike path service. They're deconflicted and regulated and licensed and taxed separately for various social engineering reasons, etc.
The car roads are congested and I want to drive my semi trailer to the next town, or I just don't feel like paying the tollbooths or whatever. I propose a "brilliant" solution of modifying the regulations for the bike path to allow semi trailers on the mostly empty paved bike path because bicycles are an ancient technology over 100 years old and they should get with the internal combustion times, I don't have a bike personally, I feel my semi trailer is more important than some spandex wearing bicycle hobbyist's amusement, and I don't care about bicycling as a hobby in general, so if I mow down bicyclists while driving my semi down the bike path thus completely destroying the utility of a bike path for bicyclists, I really don't mind. Hey I got mine, I got to drive my semi trailer on the bike path, so at least for me all is well, right?
Now just to make it clear I don't hate bicyclists any more than I think its a good idea to amend part 97 to perform stealthy part 90 operations on part 97 frequencies. I'm merely making a very accurate analogy.