if something is hard to get it doesnt mean its necessarily balanced.have no straight logical connection every time.you can pay for a card if you dont work hard for it like this but it will still remain broken.
No, it means you have worked hard and sacrificed a lot in order to buy this card.
Just like summoning a BE requires sacrificing 2 monsters, UR/SR like CC requires sacrificing time farming or your money.
This makes CC a very balanced card.