Naomi,
My butcher sells normal meat and halal meat. I have a choice.
If people were bothered, they would ask for non halal meat, and if it wasn't available, or if they did not get an assurance the meat wasn't halal, then they would not purchase the halal meat if they thought it was cruel. But no one does that.
There is probably a case that meat must be labelled if slaughted that way, and restaurants to have to state if the meat is halal. Many already do that, but then they have EDL numpties demonstrating outside their establishments.