Your friend is an idiot. MRNA vaccines are not new. Scientists have been working on a vaccine since SARS, which is similar to COVID (aka SARS-CoV-2). One of the reasons why medication can take so long to reach the public is that it takes money, which likely come from grants, which take time and have limited amounts to go around. When the pandemic broke out, countries around the world threw money at these labs. Everything else pretty much stopped, so they didn't have to wait for an understaffed and underfunded FDA to approve it.
Getting the vaccine is much better than slowly suffocating because the virus destroyed your lungs. Herd immunity only works when enough people have been vaccinated and clearly we haven't reached that yet since people are still getting infected, reinfected and dying.
There was a very flawed study years ago where a biologist observed wolves in captivity and determined that they fight for dominance within the pack. Later, he realized that in a natural setting, a pack is a breeding pair and their pups, as you stated. A natural pack is much more cohesive and doesn't have a strict hierarchy, but the ridiculous myth of "alpha wolves" won't go away completely, despite the same biologist's efforts.