Why can't I donate Gold Pass CoC?

I'm curious, why exactly can't I donate Gold Pass CoC to my clan members? Is there a specific policy or limitation in place that prevents such donations? I understand that in-game items like Gold Passes are usually tied to individual accounts, but I'm wondering if there's a technical or logistical reason behind this decision. Is it simply a matter of maintaining game balance, or are there other factors at play? I'd appreciate any clarification you can provide on this matter.