Curious to know in what ways you think so? Not that I disagree. I was at the intersection of Broomfield/Erie/Lafayette and we spend much more of our non-being home time in and around Boulder, Lafayette and Louisville than Broomfield. So, while Broomfield was our residence, Boulder was still the draw.
I used to live in Lafayette and definitely agree- the only reason we lived in Lafayette vs. Boulder was the housing was much more affordable. The town is pretty quiet but we would always drive up to Boulder if we wanted to hang out or do something fun. Denver wasn't too far away either, so we would go there for concerts or conventions or whatever.
I moved out to Oregon and live in the Salem area for a similar reason- the housing is much more affordable here than in Portland. I'm about an hour from Portland and an hour from the coast, so we split our time up between the two.
"lively" Boulder is a bland white town full of people who are almost exactly the same. They are awesome, granted, but there's little to no diversity here. The college kids are mostly wealthy out of staters whose parents can afford to pay 200000+ for an ok state school. Most come here to play hippie, snowboard, and party.
Boulder is hippies with breast implants. Beautiful, wealthy, educated people who want to isolate themselves off from the rest of society. People here are very bland. There is next to no nightlife. Bleck, what a disappointment.