I think back in the day (say the late 80s) it became apparent to those in charge that this new IT thing was going to be very important in the workplace, and that it was going to be important to train up people to operate computers.

Given those in charge were probably one finger typists if that, and befuddled by technology, they would collectively have decided that computers should be standardised so that learnt skills would be transferrable, and therefore they probably imposed ideas like standardised keyboard layouts.

Of course it turned out that the next generation were totally capable of operating computers without any formal training, were totally fine with different operating systems, different keyboard layouts, different applications etc, and so there was probably lots of wasted effort solving a non-existent problem.