You're envisioning using a touchscreen device much like you'd use your smartphone which is flawed to say the least. Having used a touchscreen laptop for the last 6+ years, I assure you there's a place for touch in laptops. The arguments against touch on a laptop are much like arguing against any other peripheral used.

> Try reaching your hand up to touch your monitor and hold it there for a minute. Now try pretending you’ll do this for an 8 hour workday.

This is asinine and you know it. That's akin to arguing that we shouldn't use mice or touchpads by saying "just try typing with an onscreen keyboard all day using point and click."