Proof: https://www.theregister.com/2016/03/23/npm_left_pad_chaos/
Sudden unplanned loss of availability is a catastrophic security problem, the A in the security CIA[1]. Worse is that the dependency that caused that problem was something that should never have been a dependency in the first place.
Proper dependency management requires a degree of trust and integrity validation which are completely counter to automation. Most developers are eager to accept any resulting consequences because they don't own the consequences and because they are fearful of writing original code.
[1] https://en.wikipedia.org/wiki/Information_security#Key_conce...