I usually steer clear of talk about technique as I have never been taught any, but I do happen to know something about this issue as I have used a Virgil Practice Clavier on and off for forty years. This device, popular in the last years of the nineteenth century, operated on the assumption that playing with a key resistance much higher than any piano must eventually improve technique. As Richard shrewdly suggests, the assumption is partly true and partly false. I can best illustrate by describing my own case.
At the time I bought the clavier from my teacher I was playing a lot of difficult stuff. I remember very clearly screwing the resistance up to a around seven ounces and working on a certain difficult passage of finger work. I then returned to the piano and the effect was intoxicating to say the least. The scale based cadenza felt so easy that I could suddenly play it up to speed in double notes in both hands instead of single notes. I then thought that if I increased the resistance still further and used the clavier for longer all technical issues would surely disappear. Had I had any brains I would have realised that because one man can mow a lawn in half an hour it does not follow that a million men can mow it in a fraction of a second. Within a few weeks my touch became horribly coarse and clumsy.
What had happened was that I had pushed the resistance and effort beyond the point of fine motor control of the fingers and had begun using weight to push the keys down. By analogy, the effect is rather like that of one of those nasal sprays which clears breathing wonderfully for three days and then itself causes a much worse blockage (rebound congestion) which takes a week to get rid of.
Is there a right or good way to use the clavier then ? Yes, used correctly it is of huge benefit in maintaining technique and eliminating the need for daily slog at the real instrument, where I am sure we all want to make real music and not grind away at dull exercises. I have explained this in other posts here years ago so I shan't repeat myself here. Essentially it involves constantly making sure of control during its use - as Thal's post implies.