why co-dependence is used as frequently as a truth in relationships?

I went into talk therapy with my partner and there the therapist talked about my partner being co-dependent on me. I know that I had thoughts about it, and that it is an expression they use to understand themselves.

She said he needs support in this situation and if he does not see it himself, he can bring this behavior into a new relationship, what do you think in SCS about co-dependence? Is this the true? Is he co-dependent?

I do not experience it as the only truth, as I work with my thoughts daily.