Whereas CC is still useful even if your opponent isn't packing garg (discharge, steam eruption, flinching, defense drops, etc) boots literally do nothing if the opponent doesn't use hazards. The only difference is that hazards are more common than strong secondary effects. It feels weird to say that strong secondary effects are broken unless there are a lot of them, in which case preparing for them is "reasonable".
No offense but this is just reaching to try and make CC seem like a better item than it is. And salt Cure isn't just a strong secondary effect, it's a strong secondary effect that is literally riskless unless the opponent has Covert Cloak or a Pokemon packing sub, or double Regen cores.