Sorry but this is such a bad take.

Linux is free to install, free to use and most importantly free to learn

What is the alternative? How many people who are now in great jobs would have been unable to teach themselves the skills they need if IIS or another proprietary technology had won the server market instead.

Something had to fill the space, would you rather it was a technology that created barriers for people with the fewest advantages in life?

(Also as others have said, a lot of OSS development is funded by companies. Linux in particular being a great example)