I've started learning Japanese but moved to Chinese (Taiwanese Mandarin). It's a similar situation:

There is the official Hanyu pinyin romanization which is "technically correct", but nobody knows how to pronounce "qiu" or how to type "lǚ". And there are other romanization schemes which aim for ease of pronunciation by people who don't know any Chinese.

It's more complicated than that and somewhat politicized, but in the end, different romanization systems make sense in different contexts.