Trying to understand the age discord

I already know I’m gonna get downvoted to FILTH but pls someone explain this bc I just don’t understand.

I keep seeing ppl use Miku for songs, and everyone seems to agree that if u use the Miku voicebank, that creates a new variant of Miku based on what the producer wants, right?

And everyone seems to say that the Miku mascot is 16 based on crypton’s description, but ppl can age up/age down their variant of Miku (ex. Utsu-P’s Hagane Miku is aged up to 19)

So wouldnt Miku’s mascot be considered 16 unless otherwise stated? I’m not talking about the voicebank but the actual character itself. I’m just trying to understand why ppl say she has no age if the company that made the character says she’s 16. I could be completely wrong tho (pls be nice, I want to understand where the argument came from). In other media, if a show’s character is stated to be a certain age, everyone respects that but for some reason when it comes to Crypton’s Miku, it doesn’t matter ?

To add onto that, ppl seem to defend Miku being sexualized but if Rin (for example) is sexualized, then they bring out the minor argument? I’m just confused (I’m not trying to sexualize either of them, again just trying to understand)

Pls be nice in the comments, I’m scared to post this and genuinely want to understand each side of the argument. Thank you!