This would be valid if it was a small natural amount of sewage from a few humans, not tens of millions of gallons. Penguins shit somewhere, so the ecosystem probably won't mind if a few humans shit where a few penguins shit. But this is like noticing a few burger wrappers on the side of the road so you dump your commercial trash bin there every week.
Humans have been living in cities for thousands of years yet we've only very recently began treating our waste. Humans outside of cities have been using septic systems for centuries.
"Tens of millions of gallons" of human waste sounds significant, but, it likely isn't. I also feel that equating the unavoidable byproduct of human scientific research in remote locations with road side burger wrappers is bordering on luddite hyperbole.
