I'd never heard of elf on the shelf until maybe 15 years ago if that. Seems like a bit of an odd concept, and to me honestly, unsustainable.
I love setting up little displays of seasonal things and toys, whimsical and cute, but I think it would be hell to have to do this for 25 days straight no matter how busy I was what else was going on in life, every year for how many years? 10 at least?
Honestly, it seems to be a tradition that was born around the same time as people taking photos of everything and then posting them to their social media, like if you make a really nice cake, and you take all these pictures and then you post it to say look at this beautiful cake I made. Well that's great it's great to show something that you're proud of, but it seems like a awful lot of people are doing this for the performative issue and I hate using that word because it's overused but it is true.
And the whole idea of the elf being like "big brother is watching?" So This creepy little doll who sits still during the day but comes alive and is mischievous at night honestly it sounds like the plot of a horror movie... And the fact that he's always watching you and he's going to snitch on you to santa? To me that sounds like a really good last minute / month of December tool to force your children into good behavior. I've heard people year-round use the threat of "Santa is watching, I'm going to call Santa if you don't go to bed now, I'm telling Santa that you were bad..." And that's what this reminds me of. So, if you don't want to do the elf, don't worry about the elf. No elf for you.
And anyone out there who loves doing the elf tradition and the creativity of it ... That's great. Cuz really, it comes down to whatever you're comfortable with, and not being forced into doing something that you don't really want to do. Just be happy. Christmas is supposed to be about being happy, not more work, not more stress.