So we hear this phrase all the time, used mostly when people want to buy their first bike, and don't want to listen to advice given by more experienced riders, which is to start small, like on the Yamaha R3 or Kawasaki Ninja 300.
They will say, "Oh, I will be ok on a 600/750/1000/Busa because I will just respect the throttle, and that the bike is only as fast as your right hand makes it.
The biggest determining factor in getting a first bike is what will happen when you fuck up, which you will. Making a mistake on a bike you should not be on will result in very bad things happening to you and the bike and possibly people around you.
Let me give you some examples.
1. I was riding back in 2005, and was leading a group ride. A new rider joined us, and said he would stay at the back, keep it slow, and respect the bike. He was on a brand new Kawasaki ZX-10R. He did what he said, stayed slow, and thought he was respecting the bike. However, he hit a pothole. The bump from the pothole caused the rider to grab a handful of throttle, which made the rear tire spin up. He didn't know what to do, and closed the throttle. Doing so proceeded to highside him into a tree. Had he been on a smaller-cc/less powerful bike, the rear tire wouldn't have spun. Had he been more experienced, he would have known not to close the throttle, and just ride it out. So he wound up in the hospital, with a destroyed bike.
2. Was riding with a new rider, attempting to help him learn the ropes a bit. He was on a K6 750 at the time. We were riding down a rural street, doing about 35mph. He thought he was in thrid, when he was actually in second. He grabbed a downshift, and instead of hitting second, he drops into first and the bike lofts the wheel. He panics, keeps the throttle open, and loops a wheelie. All he was wearing was a tank top and jeans. He didn't have collision insurance either. As the bike loops over, and lands on top of him, it hits the pavement and cracks the stator cover, spilling hot oil on him. So he is now covered in hot oil, sliding down the pavement, with a bike on top of him. I have never heard a grown man scream and cry like I did that day, especially when they took the wire brush to his road rash at the hospital. Bike was destroyed.
Those are just two examples. There are plenty more, I just don't feel like typing them. Maybe others will chime in.
I just hope that this whole "respect the bike" bullshit goes away. You can't respect a bike enough not to make mistakes on it. That goes for anyone, whether it is me, Marc Marquez, or a new rider. We all make mistakes. It is the bike we are on and our relative experience levels that determine what those mistakes do to us.
Start small. Take the MSF courses. Take track schools once you have the basics of riding down.
Hope this helps.