The biggest issue is harsh landing, friction/sticking and possibly aggressive rebound. No Cherry MX switch will help with any of that (except sticking, if compared to a broken rubber dome), unless not bottomed out or modded (dampened at the very least).
I think that’s overly pessimistic. A Cherry MX switch actuates about halfway through the stroke, meaning that keypresses that go at least that far reliably actuate it; by contrast, most rubber dome switches actuate at the bottom and sometimes fails to actuate when not mashed hard all the way down.
Untrained typists routinely use more than twice as much force as required to press the keys. On some rubber domes, this is almost a requirement to avoid occasional skipped letters.
However, it’s possible to type on an MX switch (or other mechanical switch) with light springy keypresses, using just a bit more than the minimum required force. Even if the key ends up going all the way to the bottom of the stroke, it can at least be very low impact by that point.
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Both Matias switches and dampened cream Alps switches are relatively stiff. If you modded them to use lighter springs they might be okay for someone with low finger strength. Otherwise, low-force Topre switches or brown MX switches might work. I don’t think O rings are necessary or even necessarily helpful.
Note that if switches get *too* light, then it’s no longer possible to rest the fingers on them without accidentally actuating some, which might also be undesirable.
