I disagree. Engineered builds are extremely hard to kill. My latest toy is this Adder that I use for passenger missions around Shinrarta Dezhra. It has been interdicted many times but never significantly damaged, let alone destroyed. It also survives Thargoid interdictions with hardly a scratch. The total value of that ship is less than 7 million credits. Engineering makes all the difference here.There is no skill involved in PvP in Elite, its not hard to attack a trader/miner in a combat modified ship regardless of whether its engineered or not.
This may be an extreme example, but you can make almost any ship gank-resilient without compromising their main purpose. It's even easier with the larger ones. But you need to unlock a few engineers first, and that appears to be an insurmountable hurdle to some players.