One of the themes of Pleasantville was the insularity and closed-off-ness of the town - literally in a geographical sense (only at the end do buses start going to out of town). Whereas MTV conveniently places you close to awesome things that you can access easily, while still having a good career.
There are other equally prosperous and thriving cities in the US that I would consider to be a distinct step down in terms of quality of life.
Bland means you've made it. Singapore is "bland" Yokohama is "bland". One could say life is not "bland" in the Donbass region. Santiago might be bland, but Rio de Janeiro is not bland. I'd wager many of the non-bland places would trade an arm to be successfully bland. Busan used to be gritty. Now it's a "bland" city.
Furthermore, even foreign transplants who settle in foreign places be they from India, China, Russia, Nigeria, etc., if they can, they settle in these so-called 'bland' cities, if they can. I have not yet heard anyone going to Paris saying, you know what, I'm going to settle in one of the exciting arrondisements --nevermind those other places most people gravitate to.
Mountain view isn't as exciting as living in a cultural center (SF and Oakland being them), but it's a lot better than most of the places you compare it to.
First, it's actually majority non white, meaning you get a lot of cultural diversity you'd miss in elsewhere "white middle upper class neighborhoods".
Secondly, has access to great outdoors and weather. (Not all places in the city limits, but close enough).
Interesting tech scene (especially if you count next door Palo Alto)
Decent downtown for a city its size.
And reasonably dense by American suburb standards. While not SF, it also isn't full of the mcmansion type housing found in other affluent suburbs.