Agreed with Faslo!
We have a form where we very explicitly collect consent before sending a pre-approved template via a workflow to prospects who decide they prefer using WhatsApp. It used to work perfectly… until Hubspot decided that we must manually opt in contacts…
Of course, there is no way to link the question in our form to the subscription status 
I don’t understand why Hubspot changed their policy without informing us! And I don’t really see how we can use this integration anymore, as it was supposed to create a smoother experience for contacts who prefer using WhatsApp over email…