Didn't mean to infer you had to remove the dash, on my 1988 Toyota Supra Turbo needed to repair the cruise control module that was way up under the dash. And it does help to be able to see what you are doing.
With an eight way power electric seat with power lumbar, had to disconnect all the electrical connectors, remove four floor bolts and remove the seat.
Then these switches are not just for the brake lights. Some you have to step on brake pedal before you can start your vehicle, disables the cruise control, with some AT's disables the torque converter lockup. With an MT vehicle, have to floor the clutch pedal to enable the starter.
Don't get me started with a leaky heater core, those antifreeze fumes can wreck your kidneys, with some vehicles, the heater core is the first thing on the assembly line with tons of stuff around it. Vehicles with a center console are even worse to work on.