People don't realize that molecules themselves are somewhat hypothetical, and that their interactions are more so, and that the biological reactions are even more so.
You can't ask your pharmacist to stock larger quantities of potassium nitrate because you want to make a bigger rocket.
Science grows like a weed every year.
My grandfather milked several cows twice a day and supplied the neighbours with dairy products. He liked to go visiting around the county on Saturdays, and he also enjoyed the neighbours when they came by once a week with their empty milk jars. He walked them out to their cars and hung over the driver's side window until they drove off.
We are the recipients of scientific method. We can each be a creative and active part of it if we so desire.