You can get a 15-day trial, by the way.
Why would anyone pay $100+ for a couple of games? Or for Photoshop? Or for a pair ski goggles? Or for a bottle of wine? Or for a ticket to a show? Or for a radial saw?
The difference with Mathematica is that if you don't know you like and need it already, there are numerous free and less expensive tools that do a great job, and they (usually) don't have restrictions on what you can do with them. I can make a Python notebook and start a business with it. I can use my hobby Julia code for academic research.
Some people find enough value in Mathematica, Matlab, Tableau, JMP or commercial IDEs, compilers, libraries, etc. to prefer them to the free unrestricted alternatives available.
Some people like iPhones and Macs, some people say that there are numerous less expensive devices that do a great job and don't have restrictions on what you can do with them.
What can you do with a hobby license from Wolfram? Use the software. You can't really distribute it, put it in production, or anything else besides serve your own compute needs. They forbid you from using the Home versions for any non-personal use: you can't bootstrap your startup with it. You're not allowed to get reimbursed for it by your employer. You're not allowed to use it for academic purposes. The service plan lets you use your license on a second computer, but dual boot counts as a second computer. You can't upgrade your license, you can only buy a new one. It's almost as though they don't want you to use their software.
Why would anyone who doesn't already have experience with Mathematica pay for this license?