I'm a professor and require students to submit typed homework as either docx or pdf format - a student wrote their paper in Word, took a screenshot of it (including their desktop), then saved the screenshot in pdf format.

I wouldn't equate that to not realising you can let the shower warm up. Not even close.

The programmer in me died when I read #3

Don't correct the trainer and reap the benefits, I guess... ¯_(ツ)_/¯

The best thing about Excel is the look of hatred you get when using ctrl+; in front of someone who's been manually entering the date through their entire career.