But she never says anything about distrusting aliens in ME2 or ME3 as far as I'm aware which seems to me she learned better. Cerberus is another matter though.
Also I never understood the whole I hate Ashley cause she shot Wrex. She only shoots him if you're an idiot and made the wrong choices. You never hear people hating on Shepard even though he could have shot Wrex in ME1 and 3.
Whenever I unlock something I don't find useful I try to think of it as, "Good, one less thing in between me and what I want." Once you reach level 10 with that item you can throw your hands up and celebrate that you're rid of it forever.