Om Swami
What matters more at work: results or sincere effort?
Trying your best is fine, negligence is not
If someone can't do the job even though they tried their best, that is absolutely not a problem. If someone doesn't do their job because they're negligent or lazy, that is beyond tolerance, unless it is a personal project.
If somebody can't do the job because they tried their best and could not, that is absolutely not a problem.