Please, you're talking to someone that beat DooM Eternal and its DLC on Nightmare with a controller, Mutant Virus, 1cced Silver Surfer and 1cced Metal Slug 3. But I don't expect other people who beat those games not like that invalid.
What are the point of video games? To enjoy and for relaxation.
Games were tougher when I was a kid MOSTLY because of the hold over of arcade machines making money. Also for replayability because they were so short. Theres no game thats too hard, its just about how much time do you want to spend memorizing every minor detail for one game. For example, Battletoads. The game is only deemed hard because it requires a TON of time invested in it to memorize patterns and enemy placements, and eventually ways of beating it. How long would it take someone to really sit and be able to beat it, within 1 continue? 100 hours? 1000 hours? In the end, if you can finish it in all 3 (or 5? cant remember) continues in 50 hours, but need 100 or 500 to do it in 1 continue, is it worth it? Who's gonna be impressed with the time you spent to get there?
Ultimately its up to the person if its WORTH the time invested in the game. For most people, the general audience, they want some challenge, but not to be beat over the head and find it stressful or cheap to die a lot because the game expects close to perfection. Once the n64 hit, they were able to shy away from the '100 hours to beat' thing and started to think of games you want to go and relax to. Being able to say you can beat some game in 1 continue is only impressive to people who are hardcore fans of that game. Casuals just want to finish it. And you know who they cater games towards? Casuals. They want you to finish their work. So to set your own self imposed limits to how you think a game should be beat is fine, but just for YOU. Developers want you to enjoy and COMPLETE their games, with some effort, for the thrill of the challenge, but not to the point where its almost like school work to analyze every level/section. Of course they do have hard modes for people who either want a challenge, or beat the game and are better at it. Sometimes games are made specifically for those people like those "I Wanna Be The Guy" games.
So yeah, finishing a game using what the developers give you, is it.
If you go past that, then it gets ridiculous. Alright now I think if you get 1 ups thats cheating and you didnt beat the game. Well, NOW I feel that if you die ONCE you didn't beat it.
I think really the problem is the definition of the word 'game'. I think 'game over' was really intended for that round of play, because typically the only thing you really lose is points which after the arcades when games didn't have endings didnt mean anything anyway. I don't even think theres a game on the NES that saves your score with a battery. It erases the ram when you shut it off.
The actual game isn't over until it shoves you back to the title screen, or you shut it off. Which is what I believe the developers intended.