Some of it might come down to interpretation I suppose. Like the whole ‘providing no guidance and hovering’ I actually see as being respectful and taking their son seriously. I’ve never taken it as them waiting for him to fail, more that the situation is usually important and they’re around to support and be backup if it ever happened, but they don’t want to bulldoze over him trying. (Mostly talking about Yuusaku, there, since Yukiko doesn’t solve the cases.) With them, it’s always feeling like ‘if you need us, we’ll be here’.
(Rest under read more because I always have words.)