Scalp Expansion

For FUT I know some people have tight scalps and it’s hard to do FUT on them without leaving a wide scar. So kind of a strange question, but I know and have seen some other people who had large burns scars on their scalp or large sections of scalp removed due to cancer. In order to remove the cancer/ scar, close it up properly and make sure there was hair coverage over the area, they put what looked like silicone implants under the scalp; over the course of a couple of months, they filled it with saline to pre-stretch the skin and then took it out so when it came time for the reconstructive surgery, they could stretch the hair covered scalp over to cover the removed area of the scalp without any issues and without leaving a big scar.

So someone with a big balding pattern who would better benefit from the larger graft count that FUT provides, if their scalp is tight, can they first get these silicone implants to stretch the skin before the the FUT strip is taken? Better yet, can a person with balding just get this done to stretch their hair bearing scalp over the bald area without even needing to get transplants?