Cruising through corners (no throttle/no brakes) is a dangerous habit to have as you are just a passenger with no control over the car at such point.
I'll play 'Devil's advocate' a little here. It kind of depends how you're doing it. If you're rolling up to corners and just coasting through, then we agree. Having said that, if you're going pro-level fast, there will be corners with float time where you're off both pedals and waiting. To get there, you have to be carrying enough entry speed that anything you do with the pedals is going to make you miss your apex.
When you have the grip of the car completely saturated laterally, you have to just pause and let the car do the work. Patience is a virtue. Does that mean you're a passenger? A little bit. It's like throwing a dart. Once it leaves your hand, you're committed. You just have to be the type of guy that only throws bulls-eyes to do it. For the record, I'm not one of those guys, but I know many who are.
It's kind of like what happens at the end of the straight. Generally speaking, we want to be off the gas and immediately ramping to full brake pressure as quickly as possible. New drivers will often have a lazy throttle release, some coasting and then a lazy brake...for sure this is a bad habit. But, in a lot of cars when you're really at the pointy end, there will be a momentary pause between the throttle lift (immediate, not lazy) and brake application (again, immediate application). Depending on the straight/corner, it may be 70m or so of coasting between the throttle lift and brake app.
TeeLewism #1: The point which you initiate throttle is trivial. The point which you reach full-throttle is vital.
Very often, initiating throttle application early will slow the application speed and delay the full-throttle point, Especially with a nose-heavy car and a powerful V8. Have the patience to let the car turn and then do the two-step stomp. I have posted this Boris video several times, but I believe what he does is just about perfect. He has two throttle points, ~40% and full (which shows as 85% in the vid). He's got a gap between the brake release and throttle app. When he touches the throttle, it's straight to 40%. He pauses for moment, then stomps. A nice, smooth ramp up in throttle from 0-100 isn't as fast, induces understeer and delays full throttle.
