Only you can answer why their polysaturation point
being pretty high bugs you.
I know why it would not appeal to ME. Because I have a low polysaturation point right now.
I could be this person's friend and be supportive like "Yay! Glad you are dating in a way that meets your needs! Good for you!"
I could not be this person's dating partner at this time in my life. I might meet their need for variety or diversity, but they wouldn't be needing MY need for low volume of dating partners/metas to deal with. *shrug*
When I was younger I would have welcomed "going wide" over "going deep" because I was at a different life space then. It's just going to vary not just across people, but even in the SAME person at different points in their life.