Yes like others already mentioned...not all rescues are harmed or abused...
My Honey was only surrendered because her very aged owner passed away and her husband could not care for her, as he traveled many weeks and months out of the year! She was well loved and taken care of and is a balanced and happy yorkie...she just needed someone to be with her FULL time!!! Please don't let that fear deter you from at least looking into a rescue!!
Just keep your heart open....and good luck to you in your search!