Every other major language had a recognized central authority to do its work. Spanish, French, written Chinese, etc. all had a monarchy/dictatorship of some sort to mandate the change and enforce its use.

England could have done it perhaps in Shakespeare's time or shortly thereafter, but once English spread across the globe in its modern (lack of) form with no recognized central authority with the power to force the change, it's not going to happen.

You couldn't get three states in the United States to agree on a universal spelling/pronunciation let alone the three countries in the United Kingdom. You think you'll have any more success over continents and across oceans?

Good luck!