Part of the goal there is not only "relatability" (demonstrating how this could be useful in reality) but "applicability" (demonstrating HOW to distill a math problem out of some potentially messy real world anecdote).

I have legit seen real world adults do things like say "Well, I got ten widgets because I know that's enough for two people. But there's gonna be four coming so.. uh.. 10+2=12, I'll bring 12 widgets"