That's certainly right. We don't provide any suggestion based on private data. For example, gamers cannot see the tags of an opponent if the opponent opted out to be private.
At least when I played, dota2 wasn’t like this (and it’s a better game, anyways ;-))
Realistically speaking this kind of stuff doesn’t really matter at a lower level anyways- everyone’s bad and makes dumb mistakes. And it doesn’t help to know about data if you don’t know how to capitalize on it.
I can’t recommend getting into MOBAs/ARTSs solo, but if you have 2-3 friends they’re quite a blast.
To be fair giving this info is not helpful if you're bad at the game itself. I've tried using it but I'm still only top 65%. Once you get to the level below pro players, there's so few people that you remember everybody's usernames or remember who plays on tuesday nights and will remember their playstyle / champions to ban.
I feel like gaming stats should have way better privacy options in general.