I'm not saying I know the answer, but where is the evidence? I'm eager to read it.
Correlation (pile driving the ocean floor at the same time more whales are dying than normal) does not prove causation.
If it did, you should never go to a hospital if you are sick, since death rates at the hospital are way above death rates elsewhere.
I doubt the high cost of eggs, the record low snowfall, or the war in Ukraine is the cause of the whale deaths either.
Is there any actual evidence of the cause?
Here is another possibility:
Ocean temperatures are increasing and arctic salinity is down. Arctic krill are way down, and coastal bunker are way up. Are there more local whales now, chasing local bunker, not arctic krill, than in recent times? Is more local whales causing the increase in boat strikes?
Whales are pretty smart. Why would seismic testing and pile driving prevent them from knowing a boat is fast approaching?
"all that noise is driving them crazy" fits a nice narrative, but is there any actual evidence to back it up?