why cant we use siri to text in the car anymore?

I’m getting upset because I keep getting the alert that I need to unlock my phone but it’s not recommended while driving. I’ve always used Siri to verbally send and receive texts. I purchased the X and love that I can set it in the charger of my 17 Tacoma but this is not making any sense to me at all that text no longer works while connected to automotive Bluetooth.