“The Torah also disagrees with that being a general rule, as the Torah explicitly states a wife generally cannot get a divorce if she’s the only one wanting it.”
That’s not necessarily a proof. We don’t necessarily know the reasons for that halacha. One possibility is that women are more emotional and may be too quick to give a get without taking time to think it through, so the Torah couldn’t allow that. That has no relevance for a situation in which a lady has been wanting to get divorced for 20 years. Or even for several years. When I wrote that sentence about a “general rule”, I was not referring to a case in which a lady suddenly decided she wants to give a divorce on the spur of the moment. I was referring to a case such as Lenny’s since that is the situation at hand.
There can be many reasons that the Torah (Hashem) doesn’t think that a divorce should be something that a wife should have the power to force on her husband. But that doesn’t mean that he shouldn’t be doing it. The fact that the Torah doesn’t give someone the power to force something on someone else does not necessarily mean that Hashem doesn’t want them to do it.
Maybe the Torah feels that it is better if the husband comes to the decision on his own and doesn’t feel that it was forced on him by his wife. Maybe it is better for a marriage if a husband doesn’t feel that his wife has a right to divorce him at any moment and if she doesn’t feel like she can do that. The point is that there can be many possibilities, and it is far from being a proof.