No, perfection is not yet possible. Anyone who goes into this scar revision business has to understand that there are limitations to what can be achieved. There has been cases of significant improvement posted on this forum though.
One laser sessions is usually never going to give you much improvement. All the people who've had significant improvement have done many sessions over a long period of time. I can't see the rest of your skin, but if your scarring is only localized to that area on your left temple, I would not characterize it as being "severe." I'd say it's probably moderate, though pictures don't always fully capture reality. I think subcision and suction, and possibly several laser sessions will help. With your dark skin, lasers will almost certainly cause hyperpigmentation, but that almost always resolves over time. Some people have also had success with dermstamping / needling, although that is a very slow process before you see improvement.