Vagary Conclusive

Who's canary is this?
I thought we had to 
Get out of the cave
When the thing
Keeled over;
That was years ago,
you say?
And we've been down
Here, risking explosions?
No wonder your outlook
Is dark, destructive
Expectations of
The end
Unfettered;
Risk management
You revile
While toes I try
Not to stub
Who is the wiser?
The end is the rub