I'm going to quote what Anaximander here because I think what you're talking about here is actually is an ESFJ quality being misattributed to ENFP. Believe it or not, one of the qualities we've honed in on as a "people's ENFP" quality is the idea of being zany all the time.

And the reason is it can be a quality for the ESFJ 2 over ENFP is just like you said - it's part of the charm.
This is exactly how I feel about it. I think if you give an ESFJ 2, who is for the most part looking for positive interactions and experiences affirming their lovability, the tool of Ne and place them in a society that values weirdness and quirkiness they'll engage that side of themselves more because it provides them with more of what they need. The difference is just that too...it's a side of themselves. It's playtime fuel rather than a life force. The reason ESFJs can play up the "zany all the time" quality is because it's less harmful to them to have it criticized. An ESFJ could walk around a room all the time making comical noises or funny comments and not mind some responses poking fun at them because in the end they know they're valued and loved and what's being threatened is not a completely innate part of themselves, while for an ENFP the 6th or 7th look of "haha what the hell are you talk about" will start to get tiring because it's your
life force being scrutinized.