It does not ignore it, because those "unions" are not the type of unions people generally talk about in the US when they talk about Employment Unions, and would

It does not ignore it, because those "unions" are not the type of unions people generally talk about in the US when they talk about Employment Unions, and would not be the unions employed in the US for Uber which would most certainly be a Closed Shop and not allow for the range of individualized labor deals you are talking about when it comes to unions for Entertainment and Sports, those unions are the EXCEPTION not the rule when it comes to Labor Unions in the US