Surprisingly, some people do. Usually large corporations, or people that only need that specific tool for a short period of time until they finish a specific project. Corporations usually preffer to pay leasing or other form of monthly payments over one-time payment, despite the fact that the later option is usually cheaper for the rest of us.
It is still a shitty, money-grabbing tactic not to offer license purchase alongside with monthly rent that a small percentage of users preffer.
