That sounds a bit silly. Maybe you can specify who made these rules because I forgot to check them out?
There is no way one can abuse the quicksave function, for example. It is there so that it can be used, preferably often. A level designer who doesn't take this into account should not design levels.
I also disagree with the points you made about games being, in general, shorter and easier than they used to be. To what exactly do you compare modern games? The claim that games are easier than they were is usually made by people who have played for more than a decade. Our skills have obviously gotten better. When I played Sonic 2 as a kid it was somewhat hard to preserve enough lives to beat the final boss. Now I can go back to the game and beat the final boss with at least 10 lives still left. Oh, and that game takes maybe two hours to complete. When I started playing shooters I used only keyboard; obviously things got much easier once I mastered the mouse as well. I'm sure this applies to many of us. The games didn't get easier; we just got better.
Surely some games are short but some games have always been short. On the other hand we now have tons of games with multiplayer modes you spend hundreds of hours playing to compensate for "short" single-player campaigns. ("Short" because new shooters still take me a week or two to complete, the same as before since I tend to enjoy them in small doses instead of trying to force myself to get it done in one night.)