Bitochon – Any excuse not to fast.
Achakeh Lo Bchol Yom etc…
I’d faster believe if s/o would say -if everyone has a proper Tisha B’av and does Richter Teshuva then next year Tisha B’av will be a Yom Tov. This IMO is one of the Soton’s tricks – so people will say why should I try and improve- Moshiach is coming anyway.