At a technical level, yes, okay. At a human level? No.
To a human reading the man page, these characters look basically identical on screen. Sure, one is sometimes, in some fonts, a bit bolder and/or a bit of a different length - but even when that’s true it’s hard to discern without context. So an actual _reader_ of these characters depends on context to know what one they’re seeing anyway. Literally no information is lost between the source text and the reader by using either.
Just use minus signs in the man pages. Trying to force everyone to care about the difference between dash/hyphen/minus sign is an unwinnable battle. There’s only one key on their keyboard, and that’s what they’re going to press. And there’s not enough context to do anything automatic to correct it.
You could maybe make an argument about accessibility for screen readers - but I’m pretty sure they’re always going to have to cope with minus-sign-as-dash for ever too (see argument about humans using keyboards, and the inability to do anything automatic to correct it).
The only actual, real-world, outcome _worth caring about_ of treating these differently is that, if they are treated differently, people can’t search for or copy/paste command line arguments.
Using minus signs is the better choice for most people.