Well, it is if you don't have a chain tool! I was on a group ride once (MTB) where someone broke a chain, and I would estimate that 80% of the people on the ride had no clue how to use a chain tool. I was shocked.
Although I consider these things really rare, it happened to me twice this year. The second time was a 4 hour ride (non ebike) where a stick destroyed my derailer about 1/2 way into the ride. The only option there was to call Uber or hitch hike.