If it sounds too good to be true...
...your personal information is being bought and sold by people who DO NOT have YOUR best interest in mind...only THEIRS.
I normally agree.
However, there is no requirement, no option, no request to enter any data when you download a distro.
There is no requirement, no option, no request to enter your data when running Linux. There is no option or request to use any kind of personal account when installing or running Linux.
There are enough users out there with the expertise and knowledge to look for anything in the code like that, and NO ONE has ever come forward with a suggestion or hint that the OS is stealing any kind of information.
So you can relax a little. Just be careful of any apps you download and install.