Okay im finally on a pc so I can respond better.
What we mean is that even pros admit that playing in the corners is not "better" as in the best moves. Pros will tell you, they do not play the best moves. They play the moves that will win. Playing in corners is good for pros because:
1. It limits variations
2. Already a lot of known variations
3. The point factor and number of stone logic does indeed back it up
4. To try something new like playing on the sides would be hard even if you had a good reason, because pros want to win. They don't care about playing the best, good moves. They care about winning their games. Their is a big difference. Read lessons in the fundamentals of go and you will see what he says.
So basically: Corners are not fr sure better, but noone really wants to try something crazy or innovative because of the high chance of failure from breaking the huge, long tradition, and also even if it WAS better, it would have to be consistently able to win against the time time and time perfected joseki to be used. Because all pros care about is winning. So say we find that .... some middle star poing is the BEST move in the opening. Pros won't use it until it gives them a better chance of winning than 4-4, and variations are innovated to make it simpler.
Now to our side argument: Points don't matter. Yes whoever has the most points wins. But over 50% of games are decided in kill or be killed fights. Then, every other game that is won by points is won by fighting, that gave points but noone died. Every game of go is decided by the opening fighting (joseki fighting, variations) if nothing dies/huge result there, mid game fighting (groups dieing, trade offs, points made off attacking), and if not there... then the small endgame fighting moves. You cannot sit down at a go board and think about trying to get 90 points in order to win. You don't think, yay 40 points by move 30.
You should be thinking: Who is controlling which parts of the board, what is the direction of each stone, what are the strong groups, weak groups, what are the aji, any other variations, where is the influence, what is the future going to hold, what is my long term game plan, and lastly what is his long term game plan.
Its about the fighting, the thinking, the struggle. Points are a result of the fighting, and points are a result of fighting. However if you focus on points you will lost your fights, focus on your fights and you wont lose in points if you fight correctly. If that makes sense to you

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But when I made this thread I was thinking as in: Say 500 years ago they had started with joseki in the middle of the board, had totally different joseki, tesuji/shape things, and different ideas about go. Like I mean just fundamentally different. You know how you look at shusaku go and it looks familiar, but kinda odd? Imagine that but to the extreme. Josekis being plyaed at side star points, or tengen. I think its like computers, once they get to be pro level they will play really odd looking to pros, but be just as good right? Go isnt as simple as "corners are always better".