No one would argue that you cant create a scam coin.. of course you can.. the fact that you **can** create scam coins doesnt mean that all coins/tokens are scams however. There are plenty which are not and fill a need.
As for bitcoin, bitcoin doesnt have smart contracts (thought hey are trying to and some tools give a half-assed attempt at it), and as others have pointed out that means bitcoin can not functionally provide the level of trust a blockchain with smart contracts is capable of.