Good acceleration is in fact useful and even a safety benefit, for example in overtaking on short straights on a 2-lane road.
Predictable acceleration is a safety benefit - with a car you know can't accelerate fast enough to overtake on the short straight, you just don't overtake. If one cannot control themselves and have to overtake no matter what, then leaving one's driver license voluntarily on a police station would be a good choice.
Predictability in general is good for safety; very low performance cars when driven among normal performance cars could pose safety degradation because others in traffic also make mistakes, but seriously non-performing are rare and even then the effect is small, we do have valid reasons for even lower-powered vehicles in traffic, how about bicycles.
It is however hard to dispute that excess power
can be dangerous because, well, people do make mistakes.
So having a car that accelerates faster is a
convenience not safety - it enables
some more safe overtake possibilities. It's quickly in the range of diminishing returns, though - as said, predictability of others is important, and if one is doing some muscle car stunts which may feel like safe in isolation from pure physics viewpoint, pose risks like another driver not noticing you and doing something surprising. So anything beyond maybe 200-400 hp* in normal traffic is diminishing returns and starts to increase risk of misuse - and that includes
accidental misuse even in "good hands".
*) but that depends on the mass of the vehicle. Of course those 2300kg monster SUV EVs need their 300-400hp. On a sensible lightweight sedan 200hp is already huge.
What if the car malfunctions in one way or another during the overtake, losing acceleration? That isn't some far-fetched scenario. Clutch slipping during overtaking has happened to me in two separate ICE cars. EV could have some subtle bug, maybe after Tesla's OTA update, where power stage fails at maximum peak current and enters limb mode or something. So any sensible human being leaves safety margin anyway; maybe not a huge amount, but at least some; so that
one totally unexpected incident (say, a deer jumping in the front, so you have to brake in the middle of the overtake, or the mentioned clutch slip) eats that margin, but the accident is prevented. But this safety margin offsets the theoretical overtake time. So 2x more power doesn't mean half the overtake time, but maybe 5-10% shorter. Nice-ish, but... meh.