As someone that knows and can read Hindi, Gujarat, Cyrillic, Greek, Arabic and beginner at Hangul and Hiragana, romanization absolutely helps anchor the sound. The actual sound when speaking is going to change anyways as your converse with more people. But at least, romanization helps recall and focus on the actual word that you are learning.
Using romanization is a lot worse than in a language like Japanese. In Japanese the romanization somewhat maps well to Japanese. In Korean, the various romanization methods are horrendous and don't come close to Korean at all.
Not only that-- many grammar forms require understanding the Hangul vowels to understand how to conjugate them. If you're using romanization they don't exist.
Even worse, Korean sound change rules make it hard to read Hangul without a lot of practice. If you're using romanization you're completely doomed.
A one-page alphabet reference chart would be enough to remind the reader which letter is which without relying on the romanization crutch.
Normally I don't like to make argumentative internet comments but I really passionately think romanization is a detriment to a learning tool.