eh, Denadii, Samuel is looking at the word, and you're doing just what he said people so often do.
that's all the Bible actually has to say about why she "looked back" - just that she did. everything that follows that in the essay you put is conjecture; like Samuel pointed out, it's projecting ourselves onto the story.
the scripture does not say "she didn't believe God" -- what if she did believe Him?
do you really think that after having angels at her house striking the town blind, and having been physically grabbed by the hand by these angels and taken out of the city by them, that she thought this was all a hoax and nothing was going to happen?
what if she believed God, but looked back after the children she left?
it makes a "more attractive sermon" to claim she loved television and dancing and beer and cigarettes. that kind of diatribe stirs up emotions and shame in people & puts money in the offering plate, and it's what 99% of what you've been told about this story probably amounts to. it may even be true -- but it's not what the scripture says. the scripture just doesn't say.
what if Lot's wife was trying to commit suicide?
if she did believe God, and turned back, knowing that it would cost her her life?
if that's the case, why salt?
why not let her just go to her doom?
she was made into a sign? why? for who?
and why salt?
what does this mean to the people it is for?