What are you talking about? The world have made incredible progress in just the last 20 years, lifting billions of people out of poverty, and the exact financial system you're talking about was, and is, one of the main reasons behind this push. These milliseconds translate into liquidity provided into market, which in turn translates into more efficient and less risky allocation of capital, which in turn translates into efficient production and use of labour, and so on and so on.
All of that sounds incredibly boring, but that's the case with any real human progress. It's the same with a famous, and incredibly stupid quote "the brightest minds of our generation are working on making people click ads". Every time I hear it, I remember all the small businesses and ventures that only exist because of Instagram, Facebook and Google Ads. Housewives baking cakes, a leatherworker making custom backpacks, a blacksmith restoring antique knives - those are just personal friends of mine who wouldn't be able to build their businesses if not for what those brightest minds of our generation are doing.