Can a sentence at court be changed if the public opinion deems that the law abiding this sentence is outdated and doesn't make sense to this day and age?

No, not in the way that the question seems to be asked anyway. Laws do not change because of 'popular' opinion. You must contact your legislator(s) and bring this inequity to their attention. If they can be persuaded that the law is, in fact, outdated and/or unjust, the legislators can introduce a bill to either change or repeal the law in question.