There is a difference between bad science and "not being a science" ( aka pseudoscience ).

The difference is that in one you can formulate replicable science. In the other, by its nature, you can't. Because on deals with "natural law" and the other with society.

There is no "replicable scientific test" to determine whether capitalism or socialism is the best economic system. There is no "replicable scientific test" to determine whether to have the death penalty or not. So on and so forth. Much of it is pretty much a "religious" endeavor. Pretty much those with power decide and social "science" is used to justify whereas in the past religion was the justification.