Its not like that at all.
Imagine having a warrior with 2 specs and waking up one day losing one of the specs. You still killed people with the other spec, but do you really feel like continueing now that your so limited?

I posted a bunch of logs a few weeks ago on dios, I got heaps of kills without the fiend, I could still go on and kill intermediates and newbies or gang experts. But now experts know they can never/rarely die to me solo where they could before, and that is just annoying.