I have a pair of Knipex 31 11 160, they're fairly thin and the jaws will flex easily with normal or high grip pressure.
If they didnt contact at the tip first, with a good gap near the pivot, they would not be able to apply much gripping pressure on thin/small objects if the area just ahead of the pivot closed right away. After the gap near the pivot closes any further squeezing is not transmitted to the tip...A mechanical short-circuit.
They also would not keep gripping well over time as they gradually span out, bend, or wear.
Needle nose with cutters... I avoid them completely, wont buy them at all except for those with wire stripers and crimps, the dedicated electrician variety.
I'd kill off a cheap pair quickly, whereas a good pair of non-cutter needle nose and a pair of 6-8" dedicated cutters will last many many years and be more capable and versatile for the duration.
They might be handy, but plier/cutter combinations are just weaker and rarely mesh perfectly - either the tip area hits first leaving a gap in the cutter, or the cutter hits first and leaves a gap at the tip, made worse as the tip grip/knurling wears down.
I have a nice pair of 8" Mac needle nose/cutters that have become nearly worthless (in a short time) with a visible gap at the tip when closed. They wont hold a sheet of paper at the tips nowadays.
I do have a pair of Wiha 6.5" needle nose/cutter's that came free with a set of screwdrivers. That particular pair is excellent, the cutter edges come together just barely off-center and they cut really well, but the edges still bypass each other enough that full pressure makes it all the way to the tip with a little gap between the tip and the cutter.
They're made in Taiwan for Wiha and are very precisely ground for their $20'ish price tag. Just as good or better than Knipex's finish work.
The Wiha's are a really good "disposable" pair perfect for a go-bag or light around-the-house use.