Question about having no spare tire+jack (Now with a poll!)

[imzjustplayin]

I noticed that one thing that people do in order to save weight is getting rid of the spare tire and jack, just having a roadside assistance plan instead. There is one thing though, how can the road side assistance do their job unless you don't provide them a spare tire and jack to work with? Do they bring their own tire? Do you pay for that tire? How does this all work? I feel like people have overlooked this scenario and think they're set when they're really not.