And Blazefield vehicles are usually far better maintained compared to those of other operators meaning for example a 16 year old Route 1 B7RLE looks only half its age if that.They clearly need deckers on the Aireline. Some journeys already had them and need those replacing with CAZ compliant vehicles anyway. With social distancing, they will need additional DDs.
With new deckers for Witch Way and Cityzap (and having already spent on a new fleet for the Blackburn 1), there's only so many new vehicles that can be justified so some refurbished deckers is probably the sensible way to approach it. However, some people won't be able to see past their own entrenched views.