What kind of animal is going to dig through concrete and steel and also be hundreds of meters underground in solid rock?

Apparently the hypothetical future humanoids, somehow ignorant of all prior history, who will, ignoring all warning signs, start eating as much of the waste as fast as possible, then ignoring the obvious connection between eating that stuff and getting sick...

I wish I was kidding, but the argument does seem to be "what if 100_000 years from now somebody digs this stuff up and a few people get sick or die".

It's concern trolling at its worst.

Until we find the Rosetta stone hieroglyphs were unintelligible, and that language only stopped being used 2000 years ago.

I guess they won’t have Geiger counters in the future

Neither concrete nor steel have the lifespans we're discussing thousands, or tens of thousands of years.

And. Bacteria.

When sealed several hundred meters underground in nonporous rock they do have such long lifespans. It's like observing that corn doesn't have a 10 year lifespan when left out on the counter and then objecting to canning it on that basis.