Yes, I don't have experience, but this is absolutely my impression too.

Seals live in giant colonies, arent invincible, and even within colonies their life is one permanent hustle.

Lions on the other hand live through hardships more individually and as higher/top predators have to understand the concept of other individuals & their situation (the double edged empathy skill) better, or at least something that is closer to our kin.

But also the post was from a scientists pov - let seagulls loose on Wall Street & they will just get jobs, neither of those groups would think it sus they are suddenly stealing each others fries.