Yes, I think being able to be satisfied is a life skill. If this guy can hold a job and be satisfied with it, I agree so very much that indicates he can be happy in a relationship, and can make someone else happy.

I have a sister-in-law with an objectively good life, quit work after her kid was born, my brother makes enough she doesn’t really have to, when she was in Florida she complained it was too hot, they moved to Massachusetts, but then she complained it was too cold, they moved back, in the city complained the house was too small, they moved to a big house in the suburbs well now she complains they are in the suburbs it doesn’t matter what her objective situation is, she cannot be satisfied, it’s just not in her nature.