like mentioned by ‘Robert Rapier’ you can skip the de-soldering in most cases,
for example cleaning or changing the buttons is doable, but the grey and black wires are pretty short
and wired through the inner case so it can get a bit fiddly and you have to be careful not to damage them in the process.
If you have a soldering station around i would still recommend using it.
If u remove a bit material from the cover its actually possible to rout this cable over the game card slot.