Seriously, before condemning the advice, we really (and I'm not being pedantic) need to know the discussion that took place. i.e. "Can I go for a 40 mile club run on Sunday?" is different from "is it ok if use my bike?"
There are a lot of cyclists who think there is only one speed. Someone on here said they couldn't cycle to work, because there was no washing facilities and when I suggested they just shower at home and cycle slower, that was apparently impossible. I also see a lot of people driving somewhere then cycling at the end, or taking a road cycle 5 miles on the train (yeah, some of them probably have mechanicals, but not all). Not all cyclists consider bicycles transport.
As sweat is the villain in the original post, I hope the OP was advised against running, saunas and energetic marital activities. If not, then there is a solid anti-cycling bias. I haven't got a pitch fork, but is it OK for me to attack the hospital brandishing a gardening fork?