Scar excision is not suitable for everyone. Like the article said, sometimes scar removal can result in another scar. This is particularly the case for keloid scars because keloids form during the healing process. There are some healing methods that doctors can use to try and prevent the formation of new scars, like special silicone sheets, etc., but there is no guarantee that they will work. People with keloid scars should avoid excision and should opt for steroid injections to shrink the scars.
My brother is prone to keloids and had a keloid scar removed but it came right back. The new keloid scar was even bigger than the one before! Then he had steroid injections done which worked very well and reduced the size of the scar to about half.