To be truthful, I don’t use a sidewall planer or back bevel my setups (though I like this idea better than planing).
I treat it as part of the exercise and it limits your cuts on the edge on each pass.....longer edge life. As to reduced file life, come on, file right the files last. Part of this is to use file caulk, the second is not to cut in the wrong direction as this wears out (destroys) the teeth on the file. Cut, lift, reset, repeat. Remember LIFT before RESET, don’t drag back!!!
Remember, just a 0.001 or two needs removing to sharpen, not 0.020 or more like some do. Generally I take about 0.003-5 off (because I don’t practice enough to get away with less) and touch up with a diamond to clean up