Yes I agree Boojan, I think 99.99999999999% of uses presume an earth-based observer who is not concerned about real time, but rather what they see. So the default is more logically "true"?
Here is a bit out of the Wiki for those interested. I'll implement both of these to use Stellarium for Galilean moon tracking:-
Useful Stellarium features
in your config.ini write
[astro]
flag_light_travel_time = true
[gui]
flag_show_flip_buttons = true
Accounting for light travel time is a must when you observe planetary satellites. You will also want to flip the stellarium image horizontally and/or vertically in order to match what you see in your eyepiece. You can do this with the flip buttons and/or the following keyboard shortcuts:
<Ctrl><Shift><h>: toggle horizontal image flip
<Ctrl><Shift><v>: toggle vertical image flip
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