Much of science is done with the desire to help people.
When you were mentioning blood transfusions I remember an experiment done by Canadian doctors on soldiers. At the time it was commonplace to give saline to wounded soldiers but the Doctors they might do better if they had blood. Guess what, blood transfusions worked so much better than sterile saline. From that on experiment new treatments were expanded.
Farmers have been doing "science experiments" for years by selecting the best seeds from the best crops to make the next generation of crops better. Many of todays crops are much more productive than they ever were in the past.
Computers, cellular phones, and so much more is the product of bright people trying to make peoples lives better.
Unfortunately advances come with costs. Cellphones are great...but what effect do they have on the family?
Blood transfusions are great...if they are available and done properly.
Better crops are great...as long as you have the skills and knowledge to plant properly, rotate properly and care for the soil properly.
Thanks for posting.
Have a great day