High school math education can be harmful

Every time I teach Calculus, I am pained by how students are so successfully trained by their high school math teachers to use slope-intercept form for finding equations of lines, even when point-slope equation should be used, such as in the typical problem of finding the tangent line of a curve y=f(x) at x=x₀.
Some students continue to use slope-intercept form in such context during the final.