We can come up with a million reasons to bash TNA - this ain't one of them. There's nothing wrong with using Tara on a very limited basis if she's okay with it to put over the effects of the cage match and to get more heat for Madison.
1- Tara choosing to wrestle while injured, therefore increasing the chances of worsening said injury is stupid.
2- TNA choosing to let an injured worker wrestle is stupid.
3- TNA and/or Tara choosing to wrestle knowing they will have to work around the injury therefore severely reducing the quality of the match is stupid. ("Dixie Carter cares about the wrestlers!")
4- TNA having to either postpone the tag title tourney or get a replacement for Tara just leads to problems down the line and makes the tourney look a joke.
5- Madison is the champion and shouldn't need anybody to "get heat" for her. If TNA feel that is the case given her position or are oblivious that she is a good heel on her own shows that the backstage folks are morons.
I'm not actively "bashing" TNA for the sake of, just calling that the whole situation has been poorly handled.