I do find that knocking them down to find out why they were necessary is often a lot more efficient. Even at 37 that hasn’t really changed. But that’s a lot easier to justify when the impact of that decision is a bunch of process interruption at worst.
I think the reaction is more about wanting some older adults in the room as well, not about having no younger adults in the room.
Younger people always want to knock down Chesterton’s fences whenever they see them; I know, because I was recently young.
But asking the elders why those fences exist is always a good idea; then, knock them down if the issue is resolved. Humility and curiosity are required for that.