The context of Jensen Huang's comments and Tante's commentary is in teaching children the multiplication table, long division, and square roots. As adults we might use a calculator to multiply or divide large numbers to high precision but we understand what we're doing because of practicing easier arithmetic by hand.

> How are these bad things ? We have tools for a reason

The bad thing is not bothering to learn basic arithmetic. If kids don't learn that they won't understand what the tools are doing.