Or “allowing others to get their start without the need to buy a truck and business first”. Tow trucks might be available for $5K down, but the full sticker is $50K+ for a stinger and $100K+ for a rollback.
Add a towing/impound license, insurance, land on top of that and it’s reasonable to conclude that some people would be better off driving for someone else than forcing everyone who wanted to be a tow truck driver to open a towing business.
Nobody is starting a business with a new truck and a shop and an impound lot. They are starting with a 2001 F350 rollback with 400k on it and making a buck hauling anything and anything they can. They are parking it in their own driveway and doing roadside calls at 1am and moving machinery on the side. Then they eventually build that into the kind of business you've described.
Starting off in blue collar trades is very much a "fake it 'til you make it" deal.