Do you think it was a big mistake by Sting not to go to WWE?

Sting recently came out and said that he refused a match with the Undertaker at Wrestlemania, many are calling this bs and being thought up by Dixie Carter. But if he did refuse it then do you think it was a big mistake ? He could've had a huge match and be remembered in WWE instead he went back to TNA to have a 90 second match with Jeff Hardy at a PPV.