DB press provides a larger degree of freedom of movement - this obviously means that if you're not really paying much attention to how you're doing the lift, you'll likely play to your strengths. I am a strong bencher but a lot of my power comes from triceps - so I generally hit DB press quite narrow.
Saying that, generally speaking, I think it would be more likely people DB press narrower than their bench, anyway. If there is no bar locking you in to the starting width, it's a very odd thing to keep your hands as wide as the starting position on a dumbell press.
Anybody bringing up bar benching range would be wise to remember that big DBs are generally pretty awkward, themselves - their size ensures that your DB presses have almost no chance of technically benching the DB bar itself to your chest. either. Rubberised DBs are huge or comically wide.
Beware listening to people who say benching is bad.. they mostly fall into groups such as
1. People who aren't built to bench (wrapping elbows and wrists for tiny tit weight, complain about delt pain, every workout)
2. People who don't lift properly or bit off more than they could chew, to ultimate ruin
3. Weak people
4. The unlucky (these I give a pass to, it's hard to have adversity and not imagine you're an anomaly)
Each and every person who benches pretty much knows whether they are built for it. If they are not, they should consider DB Press. But instead of giving out shit advice aka "don't bench", the proper advice is "consider whether benching is your thing".
Every powerlifter I know benches. Every powerlifter has to bench in a comp. Only in bodybuilding circles is bench the devil.
