as for joe rogan swallowing horse de-wormer. he obviously has not done the research and is just following some trend that more then 50% of his userbase also follows.
You may have seen this exchange with Dr. Sanjay Gupta, CNN medical analysist -
https://www.youtube.com/watch?v=DkTXEexNB2EIvermectin was prescribed to Joe Rogan by his medical doctor, among other therapeutics. Whether Ivermectin works or not is disputed, but the way Covid vaccine fanatics have posed this pandemic is that a vaccine is the only allowed therapeutic that someone can take. Any alternate therapeutics are just considered to be conspiracy theories, despite the fact there is literature supporting the use of ivermectin to stop viral replication. I wouldn't say to someone that they should take the gamble if they are at risk and if they haven't already produce antibodies naturally from previous infection to lay all their eggs in the ivermectin basket, though.