Yeah, it makes no sense that if you want to communicate the gospel to someone you do so in a language they can understand, otherwise you are just making noise.
I don't know that Mass was about preaching the Gospel from Trent to Vatican II so much as it was like the pinnacle of celebrating the Eucharist, which is like when the Levitical high priests would go into the holy-of-holies; they were doing that just for God, it was the most sacred human thing we could do, and what was said then was said in Hebrew and it wouldn't have changed even if nobody spoke Hebrew anymore, because it wasn't for them, it was for God.
The Latin Mass was prayed all around the whole world for near 400 years, and from what I hear, from those who attended it, it was beautiful. But it's probably right to say it wasn't ideal for because it wasn't designed for preaching the Gospel.
Nowadays with the Mass prayed in 'the vernacular' common languages, it naturally becomes more evangelistic, since the Lord's sacrificial death, burial and Resurrection are openly celebrated every single Mass during the Liturgy of the Eucharist.