Assembly builtins share the namespace with solc symbols

[axic]

function keccak256(input: memory(bytes)) -> bytes32 {
    let ptr : word = Typedef.rep(input);
    let res : word;
    assembly {
        res := keccak256(add(ptr, 32), mload(ptr))
    }
    return bytes32(res);
}

Results in:

Type error:
Arity mismatch in call to keccak256
  expected 1 argument(s)
  found    2

Error: yule generation failed

So assembly builtins/functions are in the same namespace as solc symbols? Yet they are not accessible there (and only local solc non-functions are available in yul), so I would assume this should not be the case (and is not in solidity). I'd argue that may not be optimal.