Do you know how many fossils end up each day in aggregate and gravel?
The vast majority of fossils even those which are scientifically collected have no real value or use, many of them can't even be sold as cosmetic paper weights and are often disposed off simply because they take too much space.
Egyptian mummies, especially mummified animals such as cats, were acquired en-masse to be processed into fertilizer. I also do not think it is the ideal use for ancient items.
It's not the same thing, marine fossils make up many types of aggregate.
Pretty much any aggregate that is dug from places that used to be under water and is made out of sediment and marine rocks is made out of fossils.
If you go to Morocco, Utah, Jordan Valley and 100's of other places around the world you can just spend some time pick up pretty nice looking specimens and go home.
The 100 millionth dinosaur tooth or jawbone really doesn't add any value not to mention the 100 gazillionth coronoid that would otherwise end up in your parkway or your cat's litter box.
Coal mining alone probably destroys dozens (could be a vast underestimate) of absolutely incredible, actually scientifically valuable fossils every single day. Source: have sifted through what's left when they're done.
[EDIT] point being, losing a handful of not-very-impressive pieces for this is nothing.
I'm not saying we are not destroying valuable things, but these are not valuable.
If you go to places like morocco they sell the "nice ones" in large baskets on the market or on a side of the road, the ones that would end up in this kickstarted look like the gravel that is just naturally there.
The ancient Egyptians had a sort of after-life postal system, where you wrote a message and gave it to a priest and they stuffed it into a plaster mold, killed a dog, stuffed that in there, sealed it with plaster and gave it to a runner to take to the current crypt where it was unceremonially tossed onto an enormous pile. Did this many times a day, seven days a week for 500 years. The sites have dozens of buried crypts 8X8X30 or 40 feet, along a corridor, many corridors at a site, many sites across Egypt. During busy times they cut the dogs up into pieces (not enough dogs for the rush times) to satisfy the demand.
There's nothing particularly important or special about the animal mummies that used to be processed into fertilizer. Just enormous piles of plaster, bone and dust in underground chambers, enough chambers to boggle the mind.
The vast majority of fossils even those which are scientifically collected have no real value or use, many of them can't even be sold as cosmetic paper weights and are often disposed off simply because they take too much space.