Question about the Holiday Song Draft

I was relistening to all the holiday drafts, as is tradition, and developed a question.

Mike Schur says that he doesn’t like the line from The Christmas Song, “Kids from 1 to 92” because he says it’s a random number generated for a rhyme and is meaningless. However, he finds particular delight in the line from You’re a Mean One Mr. Grinch, “I wouldn’t touch you with a 39 1/2 foot pole.” Is this not a number chosen randomly to fit the cadence of a song? Why is the latter meaningful if the former is meaningless? Thank you and good day.