Or... another perspective... Foggy was responding to Matt as an addict because Matt at that point was clearly characterizing his relationship to Daredevil that way? He doesn't appear to have quit being Daredevil for anyone other than himself at that point as part of trying to process Elektra's death.

If Foggy understood Matt to have made the decision to "quit" Daredevil and thought Matt then needed his support in doing that, then it makes sense to me that he would try and support Matt in that on his terms. So if Matt decided to treat it like an addiction, he would too.

I didn't take Foggy mentioning Matt's knuckles as him being mean so much as him knowing Matt is trying and not realizing that Matt would take it as judgment.

I also read him giving Matt his caseload to remain busy as his way of letting Matt know that if Matt does sincerely want to quit and is struggling, Matt can come to him and he will do what he can. He even admits he doesn't figure it will work but it is something.

And then when Matt decides that Daredevil is something he needs to do later, Foggy tries to be equally supportive. He really in Defenders is just hanging back and trying to figure out what Matt needs from him is how I understood it. With Matt not necessarily knowing himself.

Just another way of looking at it. Although I get fully why some fans feel like it might not make sense.