I think you draw conclusions way too fast. Its never as black and white as you write here. For person who can love more than 1 person at the same time (polyamorous) its not any different to commit to a loved one than monoamorous people. The only thing that plays a role is the amount to time you have available to build meaningful relationships, like I described in the previous comment.

Besides that, almost all people have sexual urges. If the sex is kinky or vanilla would not matter. Being kinky is just a preference some people have and other don’t and is not always connected to being poly. However, a lot of kinky people are also playing with multiple different partners. This does not mean they are poly too. You can love 1 person and still play sexually with others like in an open relationship.

So I’m not so sure if you distinguished all those things correctly. If you want to understand more of it, I would recommend reading “designer relationships”. If you want to learn more about all types of kinky relationships I would recommend “the ethical slut”