ron, let's hope you never run into a pilot who isn't as self-assured as you expect. And it's good to know that if it's in an ICAO book it can never go wrong!
I never said, that it never can go wrong, everything can go wrong, I just point out,that it's not only a pilot who can ask for visual, a lot depends on airport,whether there are mountains around or maybe a lot of vfr traffic and so on... I never said that I will insist on visual "advise if ready" everything else rests with the pilot...
Don't see any problems with visual approach if there are no significant obstacles in the vicinity