If this is the only designed in way to make multiple queries without saying "Hey Siri" repeatedly, then it is required for that operation. You literally have people above calling this the "solution" to the issue raised.

It is like Schrödinger's UI design. It is both being claimed as the solution to the problem being raised while at the same time being called entirely optional. Sounds to me like there is no actual solution, and this is a bandaid.