Do we REALLY know they weren't?
Statements like this just serve to reduce your credibility, to the extent that is possible.
Tens of thousands of people just in the US do archaeology, and hundreds of thousands more are digging for one reason or another. Are you seriously suggesting that all of those folks are part of some grand conspiracy to hide the co-mingling of human and dinosaur bones?
You expect me to seriously believe that there aren’t archaeologists out there who wouldn’t destroy any evidence like that if they found it? Not buying it.
Realistically, would you expect human and dinosaur bones to be co-mingled if they lived at the same time? Sure, they decide to build their little village right in the midst of a clutch of dinosaurs. That makes sense. /s