Add Your Mobile Phone Number

I need to take a moment and comment on the overly bossy request to "add my mobile phone number" when logging into "Blogger". This same bossy little request is also suggested by my email account provider...
The trouble is, these fine folks at Blogger and elsewhere, seem to imply I must actually have a Mobile Phone. Why is it assumed that any live human being, breathing and online, must have a cell phone??
We did temporarily try to fit in with "society" and acquired a "Go-phone" or some sort of similar apparatus. I believe it took about two weeks before my husband lost it in the Bush. (not like a forsythia or something--but off the road system in rural Alaska). Now how does that make our life more secure?

Here are other things we don't have (in case Blogger insists we do): A bathtub, stairs, central heat, or a doorbell. Things we do have: an outhouse, antique glass carboys, moose poop, and stray dogs. Now how I do I enter those numbers upon logging in??