I don't know. Instinctively I feel like I would become bored with someone that I can't have an in-depth conversation with on topics that interest me. Low intelligence to me would inherently imply a lot of negative traits, such as a lack of curiosity about the world, low ambition (or a resignation that such ambitions are out of their reach, whether this is true or not), a lack of desire, or a belief that they are unable, to improve themselves mentally, that sort of thing. You can't just say someone is not intelligent, but great in every other way. I don't think one's level of intelligence is something inherent to an individual. It has implications on the rest of their personality. It is a big aspect of themselves that they, for whatever reason, have had either little interest in or opportunity to work on. Just as I'd expect someone who finds social activities very important to find me less attractive due to me being as socially competent as a shattered roof tile, it probably isn't unlikely that I will be less attracted to someone who doesn't value intellectual pursuits.
Then again, I have no experience in this. If someone fit the bimbo description and happened to be a fulfilling presence in my life, I don't see why I wouldn't give it a go in theory. Just consider me cynical about the success of such a relationship.