That's not really right, because that implies that other people are using the word wrong. It's more that it's a word with a lot of uses, and you got stuck on one of them.
Merriam-Webster, definition 2:
2a: a state of hostility, conflict, or antagonism
b: a struggle or competition between opposing forces or for a
particular end
a class war
a war against disease
Note that last line. The use here is so extremely valid that it's an example in the dictionary!