On the contrary. You would be surprised how many drugs (especially oncology drugs), are approved without long term studies or even Phase 3 clinical trials. Some drugs are even allowed to be given to patients under compassionate use guidelines, even after the company developing the drug have themselves stopped the development program because of serious adverse events, or failure to meet a statistical meaningful endpoint in a clinical trial..
Medical science is always advancing, and if everyone had the same attitude as you towards 'new' science, we would still be using leeches and witch doctors to cure our serious ailments

Worldwide - COVID cases = 110,000,000; Deaths = 2,500,000
Worldwide - COVID vaccines administered = 200,000,000; Deaths = 0

I'm sure you can do the math

The regulatory requirements for approving drugs these days, even 'warp speed' ones, are much more stringent than back when the small pox vaccine was developed (18th Century). Over 300 Million people died from smallpox in the 20th century, which is about 3 times as many as those that died during WW1 & WW2 combined. The last case of Smallpox, worldwide, was recorded in about 1980. Not a bad achievement for a 'drug' that was invented in the 18th Century, when scientific knowledge was pretty limited, and there wasn't such a thing as regulatory approval.

Unfortunately, viruses can't distinguish between those with healthy lifestyles and those without

So much is inaccurate with your post, I wouldn't know where to begin but I would start by suggesting you look into what herd immunity actually is

Couldn't agree more with #1 & #2. I think #3 is pushing it, although not totally out of the question.

I would add a poor education system to the list. Most of these kids, even if they do graduate high school, are basically unemployable (lacking basic language, writing & arithmetic skills). Add to this a lack of job opportunities and they turn to other avenues to survive and get their fix of succeeding

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Simple math - The two best vaccines (Pfizer & Moderna) are both about 95% effective after the second dose, so 5% of those vaccinated could still get infected.

The reason you should still wear a mask after being vaccinated is becuase the vaccine protects you and not others. The vaccine 'teaches' your body how to 'build' the correct antibodies to fight the virus should you get infected. The vaccine doesn't build an invisible force field around your body that the virus can't penetrate. You are still able to 'carry' the virus and pass it on to those who have not yet been vaccinated, or those that choose not to get vaccinated. I think further studies are currently in progress to assess the degree of transmission post vaccination.

So what if he/she is tied to big pharma ? Aren't we all 'tied' to something ? Having a strong connection to a particular industry, science, business, religion etc. gives each of us more knowledge & a well rounded understanding of the subject matter.

Some countries are limiting the Oxford vaccine to 65's and under, because they feel there is not YET sufficient clinical data on the Oxford vaccine in over 65's. Even at 60-70% effectiveness it offers superior protection when compared to the flu vaccine which offers 50% protection at best. It might just be a case of tweaking the dosage in order to get better protection. I think further clinical data will come out in the next several months