I want an air-freshener because I can't stand bad smells.
Here, isn't 'I can't stand bad smells' a coordinate clause? It is complete in itself, right? It's only after adding 'because' that the sentence becomes subordinate. But 'because' is a conjunction. So, if we want to check if a clause is coordinate or subordinate, shouldn't we exclude the conjunction ('because') here?
Edit: Thanks to the people who have answered this question! Below, I am writing what I have inferred/concluded from all the answers. I request everyone, to inform if what I understood is correct or not.
subordinate clauses are necessary in the sentence to convey its full meaning, and that coordinate clauses are of greater value/importance than subordinate ones.
Coordinate and subordinate clauses can exist without the help of each other, and will make complete sense, but in order to convey the whole meaning of the original sentence, it is important to use them both.
Let's say in this sentence, both are making complete sense on its
own, but coordinate clauses are more important. "I want a freshener" is more important than telling its reason. "I can't stand bad
smells", which is the subordinate clause in this sentence, can stand alone, but it is of lesser importance in the original sentence.