[bsder]

Someone who learns a foreign language as an adult can hardly be called "lazy".

Fixing an accent is something that I would place under "hugely diminishing returns".

My classical guitar tremolo is quite poor. It would cost me probably 1,000 hours to fix--and at that point I'd probably be average. I have a LOT of other things in my guitar work that I would be far better spending that time on.

Similarly for a foreign language. Would I be better off fixing my horrible American accent in my Mandarin, or would I be better off learning 10,000 more words or kanji? As I am not a foreign language interpreter or teaching in China, the words and kanji have FAR more utility for me. And, to be fair, I would be even better off to learn one of the other dialects like Cantonese.

Time is finite.