By referring to your self, I agree. It would not be conjecture since the statement is based on your experience and abilities. If your referring to the rest of the Cmdr's in the game, then yes, it's conjecture.
And while it may be "hard" or "almost impossible" (your words) to kill an experienced Cmdr, it is possible.
From my experience, there is ALWAYS someone better at something than you. Maybe not today, or even tomorrow, but someday there will be.
There is no doubt in my mind that there are better skilled Cmdrs than myself, considering I'm a pirate, not a combat specialist. I can do the latter, but I don't focus on it.
However, where it isn't a conjecture is that anyone who stack up enough SCB/HRP and proper combat outfit equipment, a simple submit and high wake will void all skill there is. Skill is largely irrelevant in the success of destroying a Cmdr before one flees, it has a numerical limit. I can alpha as hard as I want, but if the enemy can tank for 15 second straight (which is easy to do), there is nothing I can do about it, absolutely nothing.
On top of that, don't forget FD doesn't punish combat logging seriously at all, therefore it remains an option many utilizes to avoid destruction.
Thus it is not a conjecture but reasoned argument that aftermath consequence of a ship's destruction is largely ineffective.