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
Mint is great and is absolutely enough for most people using computers, still as of now. It comes with its limitations though:
All of the above can easily be irrelevant to you and Mint is just perfect for what you need. It’s important to point out limitations of that choice, but crapping on it because you don’t like it is just pointless fuss