This is a very odd reaction. The reason that the Model M is so great is that it allows the user to not pound the keys:

- It has a force—travel-distance response curve with a distinct “click” which gives clear tactile feedback as soon as the key has been actuated (this is when it has been pushed about 2/3 of the way down). As it is pushed near the bottom, resistance gradually increases, so that it is in fact quite difficult to smash the key all the way down—it takes deliberate effort.

- It gives clear auditory feedback along with the tactile feedback (those buckling springs).

You should not be driving the key as far as it can go, as that will cause RSI. Fortunately, this happens less on a Model M than on any other keyboard I have ever used.

IBM designed these things based on decades of experience making the most popular typewriters among secretaries. Good typists can type faster on a Model M than nearly any other keyboard, with much less risk of RSI.