Aren’t all comedians writers to some degree. Unless you’re strictly ad libbing, aren’t there jokes to be written?
anywho, I digress…
I can’t say if I’d be good at either – particularly as you describe it.
I will say this – when I was sixteen, I worked at a department store. For a while, the had me work as a cashier. I hated the monotony of the job. So, to make it fun for myself, I started ad libbing and riffing off of the customers. I apparently was pretty good at it, because my line of customers were always cracking up. I was told numerous times, “You should be a comedian”. But I never became a comedian.
Similarly, I’ve done a fair amount of writing professionally. But I’m not a “writer”.
I shot photographs for over ten years before I felt comfortable offering that service to my clients. I’m still reluctant to call myself a photographer (mostly because I’m completely self-taught).
We all possess a variety of skills that relate to a number of professions. Perhaps with enough training, passion, and dedication, we could have become a chef (‘cuz your a pretty good cook), or a psychologist (as your a good listener), etc..
Where the problem lies is when someone recognizes that they possess certain skills and therefore concludes that they too could immediately do what you do – despite not having put in the work to become that thing.
I’m a graphic designer. I get this all the time. “I’m pretty creative. I could’a done that.”
Like you, I usually keep my mouth shut, but it does bug me. The process of good design is so important to me, that the presumptuous of some folks almost offends me. I would never assume such things about another person’s profession.
But that’s me. Everyone’s different.