It sounds like a good reason for Daredevil to leave Matt Murdock behind and a solid direction to take Daredevil Season 3, although there are some holes to poke in the theory.
For example, it’s been established that many in the Marvel Netflix Universe believe Matt is missing at best, but probably dead.
With Matt gone, it’s hard to believe Fisk would waste time and resources exacting revenge on those connected to Murdock, even if he’s a very vindictive man.
The people Matt cares for would likely be okay if he just simply disappeared, which probably means Matt has other reasons for keeping up his hero work other than keeping his friends safe.