I have no actual data but I'd be willing to bet a lot of actual money that of the universe of people (not businesses) that lease cars the majority are making bad financial decisions. Of course, this depends on your definition of bad.
A lease is a straightforward business expense that the tax authorities find really hard to question.
But using autos as an example, purchasing instead of leasing can open up a can of worms that can take years to get resolved. You paid too much when you bought from your cousin's auto dealership. Your depreciation method wasn't valid. Your liquidation price was too low when you sold the old used vehicles back to your cousin's dealership.
Lots of potential questions that can consume lots of time and money to get resolved.