I certainly believe that our actions can affect our health, both spiritual and physical. I do not believe that any one of the things I mentioned are THE cause of anything else. To make a claim that one individual transgression, be it Lashon Harah, Tznius, or any other of the myriad causes of the day, is causing specific tzaros is apikorsus in my opinion. At best, it is trivializing the complicated way we are judged.
Furthermore, the manner in which these are thrown around is counterproductive to having any positive effect. The way to affect change is not via false fear mongering.
Also, I’d love to see the “befeirushe chazals” that say what causes cancer.