The principle involved goes beyond swimwear.

Maybe there is a case for allowing technical development in motor racing, on the ground that this can lead to useful advances for ordinary cars. But outside of this I can't see any justification at all for stuff like hi-tech tennis racquets and so forth.   The competition is supposed to be between people, not between manufaterers. Equipment should be standardised to ensure that all competitors are on an even playing field so far as that stuff is concerned.