Although as we both drive it may not be very practical to keep altering the seating.
...
If you both have the
exact same physique, there's no point in altering the seating.
But if it's a few centimetres/inches off here and there, then I understand that neither of you are comfortable behind the wheel. Of course you have to adjust a few things (seat, steering wheel, mirrors) to be in the correct position behind the wheel!
I can't imagine that I (183 cm / 6 ft, 70 kg / 155 lb) jump behind the wheel after my wife (168 cm / 5 ft 6, 51 kg / 112 lb) drove, without changing a few things here and there... She would (have to) do the same after me driving.
And guess what... if we do so, we are both fine behind the wheel! Wife only complains about the passenger seat without height adjustment, I'm fine there.