So the logical entailment here is what? That everyone should have the dexterity of a dental surgeon so we can save the 7000 dental surgeons 3 months of training? Am I missing something?

If everything is just extremes, then acknowledge that the other extreme then is everybody sitting on their ass watching "Ow! My balls!", clad in advertisements. And given the choice between those two worlds, yes, everybody should have the dexterity of a surgeon.

Learning cursive won't automatically give you the dexterity of a dental surgeon, that's just a silly conclusion you have drawn from one example.

What is the downside of learning cursive?