Member#121709 said exactly what I was trying to highlight. ONT journeys are preferred because they reward you a complete day at the destination to finish your work. ICE become successful where people reach at their destinations by office hours (10-11) and leave in the evening (5-6), stretching the journey time to not more than 6 hours.
Timings of INDB KURJ ONT train were not an issue as much as I can recall. It was having an overnight journey only.
The matter of concern primarily is not the destination from KURJ which will attract...
more... pax, but the reason why they want to start a VB from KURJ in the first go, when both common sense and previous experience provide an inkling towards the failure.
The three aspects mentioned by you matter the most, and these are the reasons why people opt for ONT journeys.