No. I've studied the N.O.S., or the Nature of Science, at the university level and I do have some minimal knowledge about "what science is." Although I'm not a working scientist myself, more of a philosopher, I do know what consitutes the Sciences and I am aware they each have their own specific hands-on method(s). The actual methods used within the various fields depend upon the field. There is no such thing as "THE" scientific method.
I think you're perhaps confusing what is strictly and specifically known as Experimental Science with the "Sciences" on a wider, more diverse level.
No, not every science is strictly "experimental," or even empirical, in nature. This can be seen in the general more recent definitions supplied by National Science Teaching Association, the Science Council, as well as the American Association for the Advancement of Science:
www.nsta.org
Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence.
sciencecouncil.org
It also helps if you read a bit of Philosohy of Science to see that actual theory and practice in science aren't so clear cut. But sure, if we want to go with a definition that a 1st grader can follow, sort of like the one provided in simple [concise, really] "5'6 steps" by Khan Academy, then the typical notion of the "scientific method" can serve as a generic definition. But only as a very generic definition.
Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.
www.khanacademy.org
Moreover, Oppenheimer himself was a Theoretical Scientist, and no one is going to look upon the history of the Manhatten Project, which was a mix of the work of science theorists, experimentalists and technicians, and say that Oppenheimer wasn't a "real scientist" or doing "real science."
Just something to think about ... have a good day!