A comedian or comic is a person who seeks to entertain an audience by making them laugh. This might take many forms including jokes, satirical observations, amusing situations, acting foolish (as in slapstick) or employing prop comedy. A comedian who addresses an audience directly is called a stand-up comedian.
Yes it is allowed to become a comic artist as far as it does not insult or degrade others or promote falsehood.
Comic art is like any other fine art which must promote noble values, not otherwise.
Unfortunately , we see now a days many artists promote wrong ideas and wrong practices under different slogans like freedom of speech or personal sexual freedom causing misleading lay people and making them suffer, instead of guiding them to the real values which leads to successful life.