I think laser hair removal is fundamentally different from what they were selling. I understand they are cutting the hair, not destroying the follicle.
We understand that which means that the laser has to be more focused and deliver higher energy density.
Hair removal products are usually in the 20-50W ranges depending on wavelengths, the lightsaber wannabe hand held lasers are usually in the 500-2000 mW ranges and while those can burn skin and pop balloons they aren't powerful enough to burn hair.
I just don't see them having the technology to make this work, if they had it would have military applications way before shaving ones.
Hair removal products are usually in the 20-50W ranges depending on wavelengths, the lightsaber wannabe hand held lasers are usually in the 500-2000 mW ranges and while those can burn skin and pop balloons they aren't powerful enough to burn hair.
I just don't see them having the technology to make this work, if they had it would have military applications way before shaving ones.
Just for size comparison this is a laser used for soft tissue removal https://upload.wikimedia.org/wikipedia/commons/c/c7/Sharplan...
And even it won't burn hair because it works on tissue with high water content only.