This isn't really a fair statement to make. Sure some people will have struggles with using a bike all winter and it may not be possible for them, but it doesn't invalidate the ideas or arguments as a whole. To assume all people for the idea are just biased and privileged based on cherry picked negative situations is just not fair. If you can't cycle then you can't cycle. Just because a few can't do something doesnt mean that this idea as a whole is invalid.