cost, point issues for tickets, physicals, etc.. the list is huge why someone who is not commercial would not want a commercial drivers license.
do you want to go thru the process with the ATF, FBI and NFA to legally own a machine gun.. but.. not actually own one. IE.. just jump thru the hoops, back ground checks and finger prints just for the 'fun' of it? probably not.
I get all that, I really do.
I just see waaay too many guys opting for a dually and a gooseneck trailer, when a medium-duty, (at least), truck and trailer would be more appropriate for what they're hauling.
If people followed the current regulations that are already on the books, then proposals like this one, (if it's legit), probably wouldn't be......proposed. The simple truth is, that the temptation to use an inadequate-for-the-task truck/trailer combo originates with the notion that the rig isn't obviously commercial in appearance. It's plausible to onlookers that the operator isn't bending any rules when they don't have a CDL, or when they drive right by the weigh stations, or their vehicle never gets inspected.
With a proper towing rig, it's totally obvious that what we're looking at is a commercial vehicle.....and that's why many people opt out of using them.