When it comes down to it, what’s really behind the common advice given here to NOT start out on a supersport is really the question of odds.
As in, the odds of a beginner safely operating one for any length of time are pretty low. And that’s definitely true; accident rates, insurance costs, and mortality figures bear it out.
BUT…the odds aren’t zero. There *are* outliers, people who ride them as beginners and do just fine.
While I agree with the others here that it’s better to start on a small displacement bike (that’s what I did), the fact that you’re here, that you sought advice, and are fairly considering it may indicate you may be an outlier.
Most people who ask for advice re this question (it comes up a lot) have already made up their mind, and are looking for validation for their choice. When they don’t get it, they get annoyed and upset. You see this on TONS of motorcycle sites.
Have you considered a 650cc twin bike instead? Plenty of power, but with a more linear, progressive delivery. They’re easy enough for a beginner to ride, but still provide plenty of fun for experts.