The way I am interpreting it as isn't that it is a scale like with the Egyptian after life but rather that if you have sins that you are not truthfully and completely regretful of, then you are not getting into Heaven. way I see it, Heaven doesn't want any of those "For the Greater Good!" types to be around up there. Way I see it, Heaven is that gated community with the over active Home Owner association that really doesn't want dick bags screwing up the place with their awfulness, sure that means that some of the people who are genuinely good but did immoral things are raked across the coals, but they want to have the absolutely perfect little community up there where they are the pinnacle of human morality and kindness and all the rest are just things that they don't care about or are scared of ruining their little paradise. After all, and this is unfortunately true in real life, if you let the riff raff in, then the place will be worse than before.
It's kind of like Tenpenny tower in FO3, yes they are being dicks by being so exclusionary, but when you actually let the ghouls in, or in this case the sinners, then the place stops being a paradise and everyone, good or bad, who made it into Tenpenny tower, ends up dead.
And let us be honest, if people like Taylor made it into Heaven, it certainly wouldn't be Heaven for very long.