Another reason why they did not understand the true meaning of the dream is that it was a dream for Pharaoh and they thought "why would Pharaoh see anything related to famine or plenty?" Pharaoh is never hungry for bread. Therefore they made errors by assuming farfetched interpretations.
David Wallace Wells: "We Had the Vaccine the Whole Time"
"By the time the first American death was announced a month later, the vaccine had already been manufactured and shipped to the National Institutes of Health for the beginning of its Phase I clinical trial. This is — as the country and the world are rightly celebrating — the fastest timeline of development in the history of vaccines. It also means that for the entire span of the pandemic in this country, which has already killed more than 250,000 Americans, we had the tools we needed to prevent it."
Ed Yong: How Science Beat the Virus
"Amid a long winter of sickness, it’s hard not to focus on the political failures that led us to a third surge. But when people look back on this period, decades from now, they will also tell stories, both good and bad, about this extraordinary moment for science. At its best, science is a self-correcting march toward greater knowledge for the betterment of humanity. At its worst, it is a self-interested pursuit of greater prestige at the cost of truth and rigor. The pandemic brought both aspects to the fore. Humanity will benefit from the products of the COVID‑19 pivot. Science itself will too, if it learns from the experience."