It requires no skill whatsoever to attack an unarmed trader with an engineered PvP ship.
Gankers are not 'highly proficient' they have a massive advantage.
There are certainly inexperienced and/or incompetent gankers, and they surely outnumber the more competent ones, but the prolific gankers are generally not inexperienced. Denigrating the abilities of
all gankers because you don't like how they use those abilities doesn't do anyone any favors, it just leads to an inaccurate picture of the game and the opposition.
I'd wager I've encountered
significantly more gankers than yourself, because they've attacked my CMDR, many times, over the last ten-plus years and 9k+ hours. I've also fought many of the same CMDRs in PvP tournaments (when I participated in those things), or duels, where everyone involved was in the best PvP ships that could be built at the time. There has always been a core minority of gankers that are quite skilled. Some of the best pilots I've ever fought were in SDC and it's predicessors/successors.
The largest advantage the more experienced gankers have
is experience. Combined with mechanisms heavily slanted toward defense, experience is also what allows unarmed traders who have any appreciable level of it, to generally easily escape gank attempts, and why I pointed out that a mandatory training, if done for relevant skills, would dramatically reduce ganking. As it stands, one can seemingly be a member of the Pilot's federation without even knowing how to pilot a ship. The game's tutorials have also become significantly worse (as in watered down) over time.
I don't really think it's practical to force players to know anything to play, and I'm sure FDev would never go for it, but Riverside's idea, if applied to Open as a whole, could certainly result in nigh ungankable CMDRs.