That is a viable approach to some degree, but you do have to remember that in CF, "good" and "evil" are a lot more objective. Gold auras immediately imply that a person, no matter what they are doing, is doing what they are doing with benevolent intentions and good values. As a good aligned character you have to attest to that. You may well say the "road to Inferno is paved with good intentions" or "regardless of intent, magic/civilization/criminal behaviour (or whatever) is evil" but you can't deny that this person is spiritually imprinted with an inherrent goodness that shares some of your values as a fellow good. Believing that is what inspires goods to express traditionally good virtues such as compassion. Otherwise, the only thing that would separate good from neutral would be that the good labels civilization/magic/whatever as "evil" where the neutral labels civilization/magic/whatever as "wrong", and their actions become identical.

So when I say it is a viable approach, I could accept that of a splendidly roleplayed character with a lot of depth and consistency of "good" actions in other areas. With most characters, however, it is more than likely someone who doesn't want to be bothered with being held accountible to their alignment, which is where the fantasy good/evil objectivity becomes a gold standard to which the majority of characters can and should be held accountable.

You can go too far in embracing real-life subjectivity in relations to alignment. After all, in real life "good" people don't go around killing people who do things they don't approve of, except in very controlled circumstances. In real life, pro-life terrorists who go murder abortion doctors are not considered "good" people even by those who believe abortion is wrong, yet in CF, that is exactly what "good" characters are essentially doing. To make up for that, this objective good/evil idea is what guides characters with good alignments - to, when confronted with good-aligned enemies, seek alternate approaches to violence, to show compassion, and to failing that, to feel burdened by necessity when violence becomes the outcome due to their higher values.