My father was a tenured professor and growing up I heard enough horror stories from his department to know that a career as a professor at a research university is no easy career.
But at the same time, isn't a major part of your job instructing students? I understand the importance of grants, conducting research, etc. as it relates to getting tenure, but if your only focus is jumping through hoops with the end goal of getting tenured there are probably a lot easier ways to get job security and at higher pay. My point is that I would hope that those who go into a career in academia as a professor have a major interest in teaching and aren't just there to get the next promotion.