Our competitions are not called - to guard the center of the octagon and win. Yes, you can occupy the center of the octagon, but then receive all possible attacks. A fighter must and can use the entire perimeter of an octagon according to his tactics and style.
For example, the style of Mohamed Ali and Mike Tyson is completely different in how they used the different parts of the ring.
This rule of the center of the octagon is made for when one fighter avoids fight and running out from the fight. Then, yes, the one who is in the center of the octagon has the advantage.
Running into an open strike exchange against an opponent who is taller, bigger and heavier would be foolish of me.
And how bad can end this kind of "runs forward " we have seen in various fight.
I put emphasis on technique, tactics, and speed.
We are doing martial arts, it is not the hardest forehead competition to win the victory, and not to win in accidentally striking exchange. The goal is to strike inflict damage and not receive damage in a response. And this can only be achieved by training your art to the highest level.