"A drug that is assumed to help at the early stage of infection but even its manufacturer says that it should not be used outside of clinical trials..."- Drugs are used off label every single day in the US and around the world, here is just one article about that- https://www.webmd.com/a-to-z-guides/features/off-label-drug-use-what-you-need-to-know Many countries are now starting to use ivermectin and even in the US though it will not be reported in mainstream news. See therapies to deal with those who are sick instead of waiting until it is too late to even treat them https://covid19criticalcare.com/covid-19-protocols/math-plus-protocol/
"...vaccinations that are proven more effective in lowering symptoms and possibly transmissions ?"- Obviously the vaccines are not working that well if you consider Israel or Iceland for example. They have the highest vaccine compliance and some of the highest 'breakthrough' covid cases.
If Joe had the vaccine and Mary didn't they both get sick (they both are in relatively good health, below 60 etc..) Joe has very mild symptoms and thinks he may just have a cold, he continues on with life thinking that. He believes that because he is vaccinated he is free to go the store, dinner, work, etc... Mary on the other hand did not previously ever have covid nor did she have the shot, she is pretty sick, flu-ish feeling and stays home because, well, because most people do stay home if they have flu like symptoms. Who will be spreading covid? Joe or Mary?
Pfizer has admitted that efficacy drops considerably after 4-6 months while natural immunity is durable and lasting. https://www.nih.gov/news-events/nih-research-matters/lasting-immunity-found-after-recovery-covid-19 If one has recovered from covid they do not need the vaccine and if you had the vaccine you should not worry if they guy next to you has had a shot or not, he/she may have already had covid and have natural immunity.
Another think to think of https://americasfrontlinedoctors.org/frontlinenews/information-security-expert-on-revealed-pfizer-agreements-theres-good-reason-pfizer-fought-to-hide-the-details-of-these-contracts/