If the Mexican gubmint wants them protected, they’d get protected. Or, they want it done, but want someone else to pay for it.
My view is, professional excavation, likely by foreign archaeologists, but a split of the artifacts, under gubmint oversight.
It would mean that looters wouldn’t be cracking intact inscribed stela into incoherent pieces and selling them to private collectors because they can get more from multiple pieces than they can selling them intact. Plus, they can’t move things that big or smuggle them out.
I hate to see any artifacts stolen and sold on the black market. The history lost when the site is plundered just kills me. There for thousands of years and for the sake of a petty criminals spending spree all is lost forever.