No that is not correct at all!
100LL is a very dry fuel. Reg gasoline has some lube qualities to it. We can call this "top end lube". Run just 100LL in an engine not designed to run on it and you will end up burning it up.
Also 100LL is designed for engines that run at about 3500 rpm constantly. (piston engine aircraft) Running it in a higher RPM application can cause slight amounts of detonation even though it has a higher octane rating because the way it burns.
I run a mix of 100LL and high test gas in my race car. The 100LL raises the octane to keep my timing from being pulled (knock sensor) and the pump gas serves as a lube. Usually run about 50/50. I'd run race gas but it runs about $9/gal where 100LL is about $5/gal. Plus much easier to get 100LL, there is a pump not even 1/2 a mile from my house.
I think a few folks have been watching too much TV where the characters fill their car on 100LL and all of sudden it goes from 100hp to 600hp