Wrong, tamil actors ar very good an infact better than telugu actors in terms of acting, looks does not matter in south indian cinema as far as actors are concerned, or a muscle body.
Actress, i admit in tamil cinema have seen a a dearth, but we have good actresses i.e padmapriya,priyamani, bhavana which get full lead roles w.scope as opposed to being their for hero's sake and couple of songs-dance.
Asin,trisha,nayantara have all been used as dolls and no characters wer written for them, evn though thy acted in sucessful films w/big actors.
So now ther ar balance of really good "actresses" and not just dolls, so tamil cinema is improving and we can def. see writers and directors getting good roles for ladies.
