Given the high visibility of the 407 tail rotor problems, you can rest assured that Transport Canada, who is the certifying authority, is watching things pretty closely, even if you are of the opinion that Bell Helicopter isn't also pretty damned concerned if they see a problem.
Most of us have been around enough to realize there isn't a perfect:
a) design
b) manufacturer (engine, airframe, component)
c) operator
d) maintenance facility
e) airworthiness certification authority
f) pilot
g) operational authority
h) training school
If there were a perfect one of any of the above, don't you think it would corner the market in that category?
The question is
What do we do until the perfect thing comes along?