Entertaiment is entertainment, usually involving a performance. It can be as low-brow as a clown at a birthday party or as high-brow as Shakespeare, but it is always intended to entertain. It can be a distraction, an escape from reality, or a way to address important issues that affect us all.
You may see it abbreviated to entmt on a flier or in industry news publications where space is limited, but it is rarely used in general writing.
Actors, Sport Players and Influencers are entertainers so their actions and words shouldn’t be taken seriously. They are simply doing their job and entertaining their fans.