The standard starting position isn't arbitrary

Interesting question that came up in a chess960 topic. Is the standard piece set up at the beginning of the game random/historically based, or is it the actual best starting position to have most balanced, interesting, and complex games?

Me personally, I think it is one of the best starting positions possible. 1st of all the symmetry and equal spacing of the same types of pieces on the first rank allows for rapid and fair development for both sides. 2nd, every pawn is defended at least once. 3rd, every pawn move frees up at least 1 more square for a piece to move to, this isn't the case in many 960 positions. 4th, the arrangement of pieces actually makes sense. The most powerful piece and the most important piece are both together in the center, the king also being in the center adds the complexity of deciding which side it should castle on. The queen being next to the king kind of balances out it's vulnerability to attack. The rooks make the most sense to be in the corner because they will always be able to attack 14 squares in an unobstructed board, and move to any square in 2 moves if not blocked, which isn't the same for say, knights. You could make this argument for bishops (but personally I like the option of getting to decide whether to put a bishop on a main diagonal or develop it towards the center, if bishops started in the corner there would no option). The arrangement of pieces also allows for pawn moves that simultaneously opens up multiple pieces, like the d and e pawns immediately free up squares for 4 pieces. Knights can be developed in such a way that all central squares are immediately controlled.

What do you think? In terms of the game itself and not anything symbolic or historical, is the starting position of pieces actually the fairest and most interesting setup to make chess what it is?

And a clarification I'm not saying that there aren't any other starting positions that are equal, just that the current one also generates the best chess games, especially at the top level.

960 on the other hand I feel like positions get awkward very fast and it's much harder to develop your pieces normally. The normal position piece development complements itself smoothly, in 960 I've gotten to the endgame with a knight still jammed up in the corner without the time or space to develop it lol.