You might say why not use Python or Matlab?! It‘s true that you don‘t need a small handheld device to do engineering calculations where there is a ton of other much stronger and free options out there. But the thing is, a calculator is a pure dedication to one thing. You turn it on, you do your calculation, get the answer and move on. It gets out of your way. Plus it is a better feeling to type stuff using the dedicated buttons in a calculator than using a keyboard.
At no point was there a need to work with hard numbers or to learn to work with a physical calculator (I haven’t seen one in the wild in years).
But yes I would agree. So much time spent making sure people don't learn to use the tools they'll always have on hand. Programming exams on paper and that kind of inane bullshit.
I'm struggling to remember using my TI-84 in college though.