Thats like saying to someone who's played for 10 hours.. You shouldnt be using a cobra you should be using an anaconda.
The post is about comparing the Corvette and the Anaconda as everyone keeps saying how terrible the corvette is at trading compared to the anaconda and you shouldnt use the corvette for trading at all. There's always a bigger ship.
No, its saying, who silly enough to kit out a corvette for trading when at the jump distances youre using a corvette for, is going to get much more in far less time. The price difference at those levels is minimal, 20mill is barely a few hours grind.
Simply put if your doing short trade jumps a cutter will do more. Once your past the anaconda stage you know enough on how to make real profits. Using a corvette is simply nerfing yourself.
If you want to really compare the corvette vs an anaconda then you need to take in what makes the anaconda so good at trading. Having a 18ly jump range LADEN. An anaconda (with shield and decent weapons) can take on routes in 3 jumps what a corvette would do in 5, maybe 6. Thats where the anaconda always shined previously. It would carry less than a T9 but jump less and handle better (handling issue is moot vs a corvette though).
On your very specific particular route it works in favour of the ship you want it to. But routes dry up etc so having the flexibility is where an anaconda shines. Profit per hour etc is the only part thats important with number crunching.
I dont think anyone has ever said you CANT trade in a corvette, the point is WHY bother when theres far better alternatives for short and long distance trading. Might aswell be arguing over an asp vs a clipper for the pointlessness of this.