In the early days they wouldn't have accomplished anything by pushing forward, so it doesn't take all that much restraint.
I'm more impressed by people in, say, the 1990s or early 2000s. They might've had a shot but there was still too much risk, so they restrained themselves until it was a safer bet.
It is a bit of miracle that they were preserved, and not just discarded.
https://www.nationalgeographic.com/history/article/mummy-eat...
https://www.smithsonianmag.com/smart-news/archaeologists-reb...
He of the terracotta army. Not excavated yet for fear of damage, but I would so love to know...
One of the suppositions is that the main chamber contained a model of his entire kingdom, replete with rivers of mercury.
So yes. Archaeology is a bit destructive, and sometimes the destruction can go both ways. Proceed with caution.