If someone broke into my house with the intent to do harm to me, my gf, or my pets then I would have no issue ending their life. I know it's a harsh thing to say, but I don't feel someone like this should have the right to live. It really depends on the situation too. If some drunk guy kicked my door in because he thought it was his house or something then I wouldn't pull the trigger. If he had a weapon then it's a different story. It's not like i'm a heartless person. I just feel the legal system is screwed up in the US. We are paying way too much money for people to have a decent life in jail even if they commit horrible crimes.
So lets say you get lucky and are able to flash blind someone with your laser. Chances are you will only hit one eye, so he still has another eye. Even if you get both what is your next step? He has a weapon and chances are he will start swinging or shooting it in your general direction. Police in my city would probably take 3-5 minutes to get to my house, and I live in a good area. Would I try to subdue the attacker and hope he doesn't hit me with his weapon? What if I hit him with a bat and break his jaw, or cause permanent damage to him. Chances are he will then try to sue me and probably win. Even if he gets jail for a few years, what will stop him from coming back? I know guns aren't for everyone, but I they are definitely for me.