I don't know why they're saying MI doesn't have an syg law. Maybe they're talking about the part where the accused is entitled to an SYG hearing and civil immunity like the FLA law. But it doesn't matter in this case, because the main point of SYG is to extend the castle doctrine to any place where the shooter has a right to be. Here, the shooting happened on the homeowner's property, so the Castle Doctrine, not SYG, would apply. I don't know the breakdown exactly, but a lot of states have the Castle Doctrine. Maybe most?
eta: thinking about it, maybe SYG could be relevant because she didn't cross the threshhold? I'm not sure that's a valid distinction under the Castle Doctrine, but could be. Maybe that's why the part of the law quoted above thread requires a belief that there's been a break-in AND an actual break-in (paraphrasing)?
jmo