My wife and I are both experienced divers. I'm an aerospace engineer. I have reviewed many computers. Reviewed and started writing my own VPM-B software. I have also reviewed many many pages and documents on decompression and decompression models. So after all that research, I hope I understand what the little box on my arm is doing.
So, when I'm diving the most liberal computer on the market, and it says I'm close to deco set on the actual mix I'm diving. And someone else that has done the same profile on air skips about 5-10 minutes of deco with zero conservative factor they have a fair chance of getting bent. Now, the guy was in great shape, fairly young, and made proper accent rates. But its like playing Russian roulette, it will catch him someday.
I know someone that can't walk anymore because he did the same thing day in and day out. Over and over, well one day he screwed up a little bit and took a major hit.