If you intend on becoming a research mathematician who has to tackle previously unencountered problems that nobody has any clue of how to solve, it may be a good way of preparing you for it.

Not only research mathematicians but basically anyone who's supposed to research previously unencountered problems. That's the ability that universities are traditionally supposed to teach.

If that's not what you want to teach, why teach calculus in the first place? If I need an integral I can ask a computer to calculate the integral for me. Why teach someone who wants to be a software engineer calculus?

There a certain idea of egalitarianism according to which everyone should have an university education. That wasn't the point why we have universities. We have universities to teach people to tackle previously unencountered problems.

If you want to be a carpenter you don't go to university but be an apprentice with an existing carpenter. Universities are not structured to be good at teaching trades like carpenting.