If the original questions still stands, yes, it's rude to refuse to shovel. If you don't mind doing it later, I don't think it is unreasonable of you to sit down and say that you will alternate, and the rule will be that the snow must be clear by X time. I'd suggest X is something before the next morning and after 6:30 AM. I can see why not driving out a snowy driveway would be a plus, but if that makes no difference to you and is still passable, I suppose it's fine.
I think this is a social unit kind of deal. Just as you'd expect you and your bf to be invited to a party together, it is up to you as a couple to clear the snow. It is unreasonable to expect someone outside of your relationship to moderate that. How you clear it doesn't really matter, you can shovel, snow blow, hire a plow company, so long as it's done.
For the summer, there is a large around of space between fussy flower bed and mowed twice a summer. If you are talking about a garden in a town or suburb, wildflowery meadow is not really a reasonable option. For a large field in the country, it might be a different story.
As an aside, I'm waiting for a post where someone says that they think having a giant junk heap of might-be-useful-at-some-point car parts and a literal dungheap right up against the fence is fine since their neighbor only mows their yard twice a season and would we consider that rude.