It is profoundly wrong.It's undemocratic, and I'm shocked our constitution has allowed thisTrussterfsckcalamity to unfold.
I can see why, for one extreme example, a PM who suddenly died in office, might be replaced by another person and not result in an immediate GE. After all, it does take some time to arrange a GE and someone has to do the job immediately.
Other than in such cases, a GE should be seen as normal if a PM stands down - almost however it happens. There might need to be a time limit even in these cases.