I’d say maybe – worth trying but may not work great. As you say, they’re voltage dividers, but assuming the ADC inputs on the PIC are similar to the one’s on the AVR (Arduino), they aren’t the usual high impedance inputs, but instead they use a sample and hold capacitor that needs a certain current to charge fast enough. AVR recommends keeping the source impedance at 10k or below for reliable operations (and I should go read the PIC data sheets I guess but have actual work work to do).
EDIT: Narrator: He did look at the data sheets despite this, and at least the generic PIC16/PIC18 ADC docs also recommend 10k max. You could compensate for higher impedance with longer sampling windows, but then you’d have to tweak the code (if it’s even possible).