Heaven forbid, it should be as hard as is necessary to achieve the stated outcome. If someone does a course in organic synthesis and graduates from that course then a company hiring the person expects him or her to be able to synthesize chemicals to the extent or level that the course coverd.
Graduates need to know what they're taught and companies expect their prospective employees to understand the work that they need to do.
When I was a student I used to sometimes whinge about the 'tough grading' in certain courses and think I was hard done by when I either failed an exam or didn't do well in it.
The fact was that the education system made it hard for me because I either wasn't good enough and or I had not done sufficient study to pass the course.
Students shouldn't be allowed to reset the standard because they think it's set too high or that they consider the work too tough.