SOP procedures aside, is it too difficult to commit a few number combinations to memory to save your tail in extremis ?
In some ways I agree, but the procedures are written on the basis that you may have had an unreliable airspeed condition for some time before you diagnose it, so could be starting a long way away from your desired speed. Setting normal pitch/power for, say, F5/180kts when you are in reality 40kts+ slower could make things worse, not better.
In terms of crew coordination, it works better IMO. As soon as someone says “Airspeed Unreliable” you know what to do and also
what should be done by the other pilot, rather than seeing someone else set a performance attitude that is not quite what you expected.