Dive into a world of creativity!
alternatively: he read the rumor mill post Dead Apple and knows Ranpo was yeeted out into the normie dimension, hence: not an ability user. So the angle would be more that he would shine brighter and dazzle more people if there was noone with magic bullshit powers to overshadow him, with the parry could be that then he'd be utterly alone (no way for Fukuzawa to come up with 'you're a wizard Harry' bit with enough confidence to not seem sus) and there would be no convenient explanation ('I'm magic, deal with it' vs ...do they even know autism exists?) to throw at people.
...but should it? That would be revealing an exploitable weakness.
...which could be parried with:
greatness would find greatness (to nod at C&P some more)
that's what the internet is for (wink at the camera :^) )
that he would end up making his own group, thus creating a place to be for others (wink at the litnerds in the audience + give this sort of 'selfdestruction for the benefit of others is fine, actually' vibe)
at which point the followup would depend purely on the demands of the plot/authorial intent, yeah?
also interesting we never had Naoto Shirogane moment with him - i.e. without ADA, even if he was let to crime scenes he'd be treated as a tool, not a person. In this context, it really is noticable how it seems Minoura is framed like his sole point of contact with the local force. Yes, it's to set up him rescuing Ranpo later, but...
now that i think of it Untold Origins does not include a single use of an ability that could not be explained via mundane skills - Flawless as raw skill+luck, for instance.
... ONE MORE THING: what are the implications of Ranpo basically RPing Dostoy out of necessity to get a result he needs, side effects be damned?
Listen. Ranpo wasn't born with an advantage. Ranpo's ability to understand cases rationale seems like an advantage, but actually it is not, because Ranpo is trying to hold on among the talented people with his brain, and he is fighting with people who have a gift in their hands. What happened like someone fighting against superior intelligence with their own analysis. A working person who makes the move with their ability to analyze against someone blessed with talent. Ranpo seems to have an advantage, but actually he also has disadvantages because there would be no world he can live if his learned talent gone. That's why I so want to see Ranpo and Fyodor talk. Imagine, Fyodor there are people gifted with ability, Fyodor see this as unfair, a sint and argues with Ranpo, who isn't actually gifted but has a talent.