Likely because of social concepts of space where haptics serving as 1st fiddle pretty much requires some type/association of direct/close contact/feedback without context. Haptics playing 2nd fiddle allows for context for interpretation. aka raised dot on j & f keys of a qwert keyboard. responsiveness of keyboard keys for touch typist vs. non-touch typist.
Examples: https://www.creativeapplications.net/?s=touch
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