American, i agree to a large extent, but there are conditions to “hamaor shebah” – the ramchal writes that it needs to be serious learning, as serious as if this person would be learning secular studies. There also has to be a tiny desire to get better according to others, and it can’t be al menaa lekanter, which is what chazal call “sam hamaves”
Also, it’s not just the dress; these same people go to tish, give kevitalach, keep minhagim, and other chasidish things; shul is a big thing too – but i do agree that the litvak who learns hours a day is in a better spiritual predicament overall.