There are a lot of negative things that have been associated with procrastination. There are some who feel that this is being done only by those who feel depressed and sad. There are also some who say that their feelings of procrastination are due to anxiety. At times, procrastination is being done by people who have had enough with work. They are already feeling burned out.
Procrastination is usually done by people who feel that they are already stressed out and they just need to take a break. The bad part about this is it would only make their work pile up. It might increase the amount of time that they have to spend just to finish their tasks.
Procrastination - failing to get on with a task, or fiddling around while thinking about the real task - very annoying for a person who is waiting for the output of the procrastinator.
Is it a mental construct? Well we can't see procrastination, only its effects. However, we do know it exists as a behaviour for we either recognise ourselves procrastinating, or sigh and grumble at others doing so.