What do think about what the doctor said about scientists over-selling vaccine's effectiveness to the general public?
The short reply is I do not believe they did. The history since December 2019 is one of record and really not open to debate. You and others may have raised your expectations too high (including your doctor) but this was a new vaccine, new technology, a scientific breakthrough and speaking for myself and those close to me, no-one believed that this was a slam-dunk on the research front. None of us changed our ‘precautions’ once we’d been vaccinated. What did become more evident through 2021 was that transmission was more commonly via aerosols rather than contact eye/mouth infection thus we continued to observe distancing and hygiene, restricting contact with others to the outdoors and preferably in a slight breeze whenever possible.
No vaccine had ever been produced in less than 8 years and there were always two questions a) how effective would the vaccine be in the real world, and b) how long would those anti-bodies last? The later discovery of the Delta variant caused more infections, spread faster than earlier forms of the virus and still causes more severe illness than previous strains in unvaccinated people.
Add to the above that the two leading vaccine candidates used different ‘tech’. AstraZeneca and Johnson and Johnson both used the traditional tech whereas Pfizer and Moderna were both mRNA based.
So, no, you weren’t ‘sold’ anything, nothing was a given, the FDA gave their approval for ‘emergency use’ and at no point was ‘research’ discontinued.
SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2), was isolated in late 2019. Its genetic sequence was published on 11 January 2020, triggering an urgent international response to prepare for an outbreak and hasten development of a preventive COVID-19 vaccine. Since 2020, vaccine development has been expedited via unprecedented research …
In February 2020, the World Health Organization (WHO) said it did not expect a vaccine against SARS‑CoV‑2 to become available in less than 18 months.
On 2 December 2020, the United Kingdom's Medicines and Healthcare products Regulatory Agency (MHRA) gave temporary regulatory approval for the Pfizer–BioNTech vaccine, becoming the first country to approve the vaccine and the first country in the Western world to approve the use of any COVID‑19 vaccine. As of 21 December 2020, many countries and the European Union had authorized or approved the Pfizer–BioNTech COVID‑19 vaccine.
https://en.wikipedia.org/wiki/COVID-19_vaccine