Actually good point, I was thinking the lady gaga episode, but I don’t know if at this point that is still the lowest rated. But really, even not going by ratings and just going each persons personal opinion, the worst episode they can think of, or even while they are watching it, thinking, " this isn’t a great episode". It’s still better than most other stuff on tv, just not a good episode of simpsons.
Kind of like saturday night live, even the bad episodes and seasons are still a pretty good show. And easy to appreciate the effort involved.
I think that specific block is also more likely to be a street address in a city. So it has two reasons to be common easy to remember numbers.