He said parasites, not just worms.
Worms are less of a problem in the developed world than microbes. Killing microbes involves strong antibacterial or antiviral drugs that wipe out your gut biome and it takes weeks or months to recover. In the meanwhile you're shitting rice pudding.
Any kind of anal sex is a significant risk to catching one of these parasites. Gay bowel disease wasn't a hysterical fantasy of weird Christian busybodies. It was (and continues to be) a real phenomenon, backed up by data.
An individual of any sex who doesn't bang anything that moves and takes reasonable precautions is probably fine to engage in these riskier acts.
But that doesn't mean the risk is imaginary or that people are prudish for going "eww gross, can't you catch something?". Well yes, yes you can.
It's the kind of thing that, if you're going to engage in it in a safer way, you just quietly keep it to yourself.
Idk KF is probably the wrong place to announce your love of eating ass. Maybe like a juggalo forum or something would've been better.