If you really want help, I’ll try. While I’ve stayed out of this particular argument, I understand completely where you’re coming from. With that said, the way you convey the message is very important.
If vaccine efficacy is 50%, then all I’m doing to myself by getting vaccinated is reducing my chances by half. That makes the vaccine seem pretty fucking weak, quite frankly. Sure, we both know there are other things going on besides those numbers and there is the responsibility to others that is also impacted, but that’s what a subset of people will see, because that’s what they’re looking for.
If, on the other hand, you focused on how to handle the Delta variant, i.e. through a harder push for vaccinations over all, increasing mask usage to earlier levels, and looking at potential boosters, you’d probably not get any arguments, certainly not from me. A more sober discussion about the different studies around efficacy of every vaccine/variant combination out there would probably fly as well, but only if it stays toned down a bit. You’d also be a lot less likely to fill the head of anti-vaxxers with more excuses about why they should ignore the CDC (which is all they hear, not which statements they should ignore).