Some artists are unaware of their own strengths and weaknesses.

Singers who are great may not have sufficient skill in both singing and playing the musical instrument through which, they perform are included in such examples and categories.

Adding here, another example would be the rhythm guitarist as he tries to take the lead despite the fact that the guitarist who is to lead is much superior.

Or what about the rapper (spent 8 years crafting) turned producer (spent1 year crafting) who has an album deadline of 3 months, so they generate amazing raps over sub-par beat?

Bands believing that they are doing good by satisfying all can also be seen falling into such categories at times (On the other hand, there are some bands who work very hard and learn the skill professionally and perform everything well)

The bottom line is- It’s good to realize your good points and stick to them, particularly when someone else might be able to get the job done in a better way.