I don’t understand how it would be better if it were Latin and no one understood
The point is to give people a choice!
If you want to attend the Latin Mass (now, sadly, termed “extraordinary”), then the Church should support it.
If you want to go to a hippy-dippy Kumbaya guitar Mass instead, or to a Mass in a language other than Latin, well, that should be offered, too!
Get an English/Latin missal. Besides Latin is the official language of the Vatican representing the Catholic Church. Did you not see the Roman Easter Vigil Mass on world-wide TV? They mostly used Latin for the official prayers.
The great convenience of having ONE Latin Mass worldwide is that you can take your English/Latin missal anywhere in the world on a particular day and are able to follow the Mass of the day, wherever you are, knowing that the same words of prayer are used at home, wherever it may be. It’s called UNITY.
The great thing about the Latin is that no matter where you attended Mass, anywhere on the Planet, the Mass was the same. I am a convert, and I understand the Latin. I find it odd, that some Cradle Catholics don't.
I don't translate the Latin into English, I think in Latin when I'm in a Latin Mass...Just like when you are in France, and speaking French, you think in French..Hope that makes sense.