Well, I tend to see it like opioids, for example. Some people can just use their prescribed dosage and in the end they have no addiction whatsoever. Many more, even though they use their prescribed dosage, start an addiction which can lead to their lives getting ruined.
I think the same happens with social media. There are people who are more prone to addiction than others. People close to me have claimed to have felt much better after deleting/deactivating their social media accounts.
Personally it's been more than 10 years without Facebook, and I never had an Instagram, so there's not much I can say about the topic from my own experience.
I'm guessing a single hash could be problematic for detections based on the domain for example. But this could be circumvented by sending hashed parts of the URL.
For example they could hash the domain, path and query separately.