Look at Russia - the moment market forces were introduced, scientists were out of work in droves. Of course, things have been constructed throughout history, long before there were universities that gave people academic titles and thus the exclusive privilege to control certain professions. People constructed things long before Newton had formulated his laws. They did not listen to Newton's instructions first, before constructing things like some mindless assembly-line robots, they did not ask permission from scientists first. Again, on the one hand, scientists argue that Newton's laws apply even retrospectively, but on the other hand they say that Newton's laws only apply within a given framework, defining and changing the rules as it suits them.
Scientific equations are just like tautologies and similar techniques so often used by poets.
If what is at one side of the equation is already included in the definition of what is at the other side of the equation, then it is a pretty empty statement. There is nothing wrong with this, as long as it is called poetry. But if this is done under the name of science, scientists make it look as if they have discovered some hidden, eternal and universal truth. Of course, one can regard science as just another subset of poetry, or art, if you like, but in that case an artist shouldn't turn up with the same old hat all the time. As artists, scientists would not make it in the real world.