No, they won't. That's how you lift in competition. And I haven't seen anyone saying that it shouldn't be done that way. It's obviously safer to have spotters. But if you're not that strong and you're benching maybe 100kg, it's not that big of a deal if you fail. I've failed with 100kg before, I rolled it off, no problem. What is your argument against this? That a "clean" fail (having to lower the bar down to the chest again) is very dangerous, or that you could drop the weight and have it crush you?