Death in gote
There is a saying in Go: that there is a 'fate worse than death'.
If you blindly continue to add stones to a dying, hopeless group, you may die in gote. That is, you may play a move that doesn't even threaten to live. Your opponent can play tenuki, and your group still can't live.
This can apply to capturing races, as well as conventional life and death situations. In the former case there is perhaps more risk, since one may need to count two numbers, which may be larger than two (and also, to be kinder, the counting can be complex).
Extremely amateurish - the problem at a psychological level is a confusion about the use of threats for their own sake, rather than trying with every play to achieve something definite.
See also: