Because people suggest distros based on their preference, not what is best suited in a given situation.
On one hand Mint is limited to X11 for now and surprise surprise “dealing with multiple monitors is horrible on Linux”. On other hand they’re on NVIDIA. This is close to not be the case, but X11 was a hard requirement for decades
By default Mint ships 3 years old kernel and a lot of hardware don’t work with it. Mint allows installing newer kernel easily but one must know that is the case.
Mint only works on X11. This is fine to some, but to others it’s a showcase of X shortcomings right away