When the developers aren't indeed being lazy like OP is passive aggressively alleging. AC4 is the best in the series imo.
The developer's quote seems pretty straight forward or are you reading between the lines? I agree about the "nitpicking if it runs fine" but it seems quite obvious they would rather have us throw more horsepower $$ at it than do extra work on their end sometimes. That isn't right no matter how you try and spin it.