Debates are a performance. They (obviously) are not about substance.
In what universe does good substance delivered horrifically win out over silver-tongued charlatans with stylish bad ideas?
All of American (human?) history points to the exact opposite conclusion.
OK. So debates are artifices that don't actually reflect things that matter. So now the question becomes, do debates themselves matter in swinging elections--that is, do debate performances, however superficial they may be, nevertheless still impact elections?
The evidence suggests they don't!