Your first assumption is wrong. Most priests these days do not know Latin. Those who know it fall into two categories: they love it, having learned it outside the seminary/ they love it, having learned it IN the seminary and realizing its utility and beauty; OR--they learned it in the sem and absolutely hate it.
I stand corrected if that is so. I think it's shameful if a majority of Catholic priests do not know Latin.
Latin is, however, the root of many languages and I don't think it's unreasonable to expect it to be treated as any other language in which the mass may be offered.
Do all priests know Spanish, Italian, German, French, Vietnamese,etc,etc?
I still have my Latin missal. I could read it aloud- perhaps the pronunciation would not be perfect, but I could read it. Why couldn't a priest?
Why is Latin-as a language- bad? Because it's 'dead', obscure?
Togo is obscure, so is Swahili. Mass offered in either of those languages is ok- but you prefer the Latin language and you're bad?