You can "call" as much as you like, it doesn't change the facts, it's a cop out and an abuse. The fact that you say you are a "good pilot" is even more of a farce.
I don't even understand what you're saying here. I chose to stop flying my T9 because no matter how good a pilot I am I don't like taking approximately a 10% risk of losing 12 million credits of ship + cargo every time I'm interdicted. There is literally nothing you can do in a T9 when you fail an interdiction against an Elite FAS, you can't run and you can't even drop cargo in time because there is maybe 1-2 seconds between the NPC "drop cargo" message and "now you die" message. The difficulty curve is not an appropriate risk/reward for trading in dedicated trade ships, where you can be interdicted 20 times per hour or more and a rebuy on a full T9 + cargo is two hours of grinding VERY boring trading at around 6 million per hour. So now I fly my combat-speced python for trading, but only make 4 million per hour, and my Type 9 is collecting dust. For many players however this has obliterated their favourite playstyle, i.e., dedicated trading, to the point where they are actually losing credits instead of earning them. THAT is why some players have resorted to combat logging. I don't combat log except in very rare circumstances (i.e., game messes up my keybinds and I'm stuck loitering on a landing pad without the ability to maneuver), but I understand why some players feel the need to resort to this regularly.
You are forewarned as to the competency of the AI so you are forearmed with that knowledge to fit and fly you ship accordingly. If you can't do that successfully without abusing the system continuously then use a different ship, tactic or fit.
This makes no sense at all. NO ONE was "forewarned" about anything, 1.6/2.1 completely changed the difficulty curve to the point that most players simply didn't understand why encounters that they casually flew away from were now killing them in under 10 seconds. The problem here is FD took lobotomized NPCs and suddenly turned it up to 11 with Elite NPC + engineering mods, and somehow thought that wouldn't have a massive impact on the game for players in non-combat roles.
As far as interdiction glitches I have experienced none, so I am slow to believe such excuses. It may happen once but a regular occurrence, unlikely.
If you haven't encountered the bugged interdictions then you clearly don't fly cargo ships enough. They are well known and are presumably due to the interdiction escape vector appearing directly behind the ship, meaning you fail even before you can submit, and it tends to be much more common with the trading ships that have limited maneuverability as they insta-fail such an interdiction immediately while say a vulture or FDS might have an extra second or two to submit. If you haven't encountered this or even heard of it then I'd suggest you spend more time trading and get interdicted more often to understand what the OP is dealing with.
The amount of information and advice given to cmdrs on this forum is copious so really it's pure incompetence and poor skill levels if people are still unable to submit and evade the AI at this stage.
Or maybe you simply have no idea what you're taking about. Do you even fly a T9? If not then go back and become a dedicated trader for a while to understand the game from a non-combat player's perspective. I do all three game activities (combat/trading/exploration) regularly in a variety of ships so I know exactly what the OP is taking about.