Beginner/intermediate/pro are labels created by marketing departments and used to differentiate the various quality grades manufactured by mass producers of drums. There are other labels (Studio, Stage, Touring) which cater to functionality, but overall, it's just marketing jargon.
Being a professional only requires that you're getting paid. It has nothing to do with the quality of your kit or playing ability.
Being a professional only requires that you're getting paid. It has nothing to do with the quality of your kit or playing ability.