>>15159386That is the closest real world parallel unfortunately.
Going by the canon though proves that the Pokemon world and ours is extremely different.
Pokemon are also shown to be far more intelligent than animals and much more capable of showing emotions.
Couple that in with the fact that trainers are most connected with their Pokemon because they understand each other almost perfectly just by battling, entering contests, or just being with them.
Being able to understand each other to such a degree is what makes Pokemon and humans great friends.
I don't doubt that if that world existed though that some people or even some Pokemon might want to take that relationship a bit further.
It doesn't sound appealing to me to be with a Pokemon but I get SOME of the reasoning behind it.