Earlier quoted context omitted.
There were certainly integral solving validators online when I took calculus in high school. At some point I gave up and just used that, because “the money is in web application development, I don’t need that calculus stuff”. Big regret. Edit: For reference, the regret came when I tried to do some RF related projects on the side. Those projects would likely have gone somewhere if I put some effort into even the basic…
I have never needed calculus since leaving university, nearly 40 year ago. If you're not in hard engineering, you probably won't (and if you are, you'll get to use all the computer assisting tools you want).
You're right that most people don't need to know calculus in their lives, but to my knowledge calculus also isn't generally required to get through college/university for most people, so it's fair to assume that the people in the course are there because they need or want to learn it. When I was a TA for calculus, most of my students were pre-med, engineers, or in other sciences.