Happiness is kind of subjective.
It all depends on your blood and taste for such happiness. I saw a youtuber by the screen name of ggangler and they are just mexican kids and all they do is fishing daily around their areas of galvaston texas. Someone asked them if they go to school and they said they fish for a living. They be catching some big fishes from the jetty and beach areas and releases them back. To me, that's my happiness. I wouldn't want to live in that area due to hurricanes but I rather choose that over a hawaii vacation unless it is just a full time fishing expedition. One can say that you can also fish here in california as we have lakes and beaches but the fishes are not as abundant like the ones they have in the gulf of mexico.
Why fremont is the happiness? Well it all depends on who they are doing the studying. Fremont to me have a large population of curry people. Curry people are nice people who marries their own kind so they will give you a 10 out of 10 ratings if you do a survey with them. With them doing tech jobs or 7-11 mini mart and have a happy family life plus the housing is a tad cheaper in fremont than san jose, no wonder the people living in fremont are more happier. I worked in fremont and along them tech buildings like the Tesla factory on Kato but how come I'm not happy.