When compared with the 30 degrees of movement available from the pedals at low speed then there is no need for them to be switched off for T/Os and landings.
The issue with turning YDs off for takeoff and/or landing is the possible impact on minimum control speeds through a possible reduction in rudder travel (due to the YDs 'pushing' the other way and removing some control power; or due to 'lost motion' in the YD system preventing a full pedal demand getting to the rudder PCUs). You can't just look at the relative displacements and say it doesn't matter because it's only 20% of travel (and anyway, 20% of travel is a LOT when you look at min control speed impact).
Generally, credit is taken for full travel authority when determining min control speeds. therefore it has to be demonstrated/shown that the YD system will not reduce the available travel - usually by some 'smarts' in the system which takes itself briefly offline while the min control speed rudder application is happening.