All fonts have a license which protects their copyright, and some of them are free to use, others not, others only free for non commercial use.
Fonts are like software or images or texts really. Someone worked to create them, they deserve payment for their work.
The issue is that as a lot of people have bunches of TTF, PS and OTF files that have no copy protection, there is a widespread belief that fonts are free to use and that they have no license.
Nothing further from the truth.