Actually, she only said "well, this road didn't work, let's go take the other one".
Trial and error can work in certain circumstances, and we know that Andi is capable of some problem-solving, but doing trial and error was never her intention in the first place, she just picked directions and either expected them to be good on first try based on her belief anything is better than what Bandana proposes or just did a random choice at the last second and then pat herself on the back for being awesome, without regards for the actual results aside from "I didn't kill everyone with my decision."
What Andi is doing is like trying sword fighting for the first time in a duel to the death thinking she'll win, then call it trial and error when she get wounded.