"...a good way to be happy..." ... "...should aim higher than living an happy cattle life..."
I'm not sure. Some other posters also brought up a similar argument. I'm not convinced that there is a moral ordering or ways to be happy, as long as the criteria are constrained to internal ones (i.e., as long as the criteria don't affect others - a society of 9 male rapists and one woman is presumably one where 90% of the population is happy, but that doesn't make it a just or right society)
I don't agree that hardship and/or grief are required for great achievements. On the contrary, I think that most achievements are done by people who are already in the 5th layer of Maslow's hierarchy. It's subjective what 'great achievement' is, but in the trend of this site, let's take some big software companies; were Bill Gates, Steve Jobs or Mark Zuckerberg living in mud huts, going to sleep every night feeling hungry? I don't know the details about any of them, but it seems from a cursory Wikipedia glance that all of them grew up in environments where the 'happy cattle life' was the norm, and it was some other internal motivation that drove them to create and not a desire to get away from hardship.
Also, note that I didn't say 'intellectual snobbery', but 'pseudo-intellectual snobbery'. Being a rebel for rebellion's sake, agitating against everything that is mainstream, is not intellectualism, it's mostly a trait of wannabe students and hipsters who are still in their formative years and derive their self image from contrasting themselves with the rest of society. Now actual intellectual thought can also be contrary to mainstream thinking of course, but it needs to be backed up with solid reasoning from data, axioms etc. and not with 'most people are stupid, so what most people are thinking is wrong' (even leaving apart that by definition it's impossible for most people to be stupid, unless one sets the benchmark for stupidity at an arbitrarily high level, at which point it's just definition again).