This is not true. Calculating a log by hand would be the same process every time. Factoring quadratics is mostly the same every time, while factoring in genera

This is not true. Calculating a log by hand would be the same process every time. Factoring quadratics is mostly the same every time, while factoring in general is not, and graphing definitely is not. Graphing, in particular, is a crucial math skill, because it forces you to understand what is actually going on with each function. As a rule, students who have no idea what a graph is going to look like before they press "graph" also don't understand many important underlying fundamentals. There is no reason middle/high school students should be using graphing calculators on a regular basis. Scientific calculators for things like logs are fine, but beyond that the calculator replaces actual learning.