I don’t think that is a safe conclusion at all, the colonial Europeans were pretty notorious for removing anything or anyone or anything they didn’t see as civilized in the Americas. They also brought disease that wiped out an astounding number of the native people. From an also uninformed view it would be just as likely the native dogs suffered a similar fate, or simply disbanded and roamed free when their companions died.
I use MXLinux, picked it somewhat at random when I was frustrated with windows 10 privacy settings and haven’t looked back since. I tried mint, mint cinnamon, Ubuntu, and Fedora before MX, and Fedora is the only other one I have stuck with, to use on a Surface Pro (I needed Wayland for the touchscreen).
MX has been really stable, light on resources, and has worked really well through two complete hardware upgrades. I play games on steam, some brand new some old, and I haven’t found one that I can’t play yet. That is due to steam/proton/proton GE more than the OS I expect but I’m happy nonetheless. I also run my home entertainment box on MX on an old PC (I know there are better choices for os for this, I was just comfortable with it).
I like it because I haven’t felt any reason to try anything else, perhaps someday I will and I’ll just find a new OS then, but until then it’s my favorite I think.