If the idea was to make it a struggle to learn, the gemorah would have been written in Hebrew, not Aramaic. Aramaic was the everyday spoken language of the people, as is English in the US
I think the idea is to study the teachings of the Tannaim, Amoraim and later commentators. Those teachings are best represented in a language in which they were fluent.
I would study in Aramaic or Hebrew if I could, but for now, I have to use English. Otherwise I’d have to spend a week on each sentence.