Particularly true is the central claim that scams are a game of cat and mouse in which new strategies are constantly being developed. As you correctly point out with research alone cannot guarantee your safety. Scammers use psychological traps to target victims and then double scam them so your advice to be less greedy and to never try to recover stolen assets is essential.
And you are dead right that greed is the primary cause that makes people fall into scams. Just because you learn the scams of yesterday, there are more to appear and they can never be sure to 100 percent safe. Never divulging your wallet seed, never clicking on random links should be obvious but essential. It is also prudent to have a different wallet when doing giveaways, giveaways are used as bait usually. Attempting to recover stolen money tends to only complicate matters further and as such, it is advisable to instead think of prevention. The only way to keep oneself safe in this game is actually to keep one cautionary and to not get consumed by greed.