The solution to getting rid of the seams is to extend the textures out beyond the UV template boundary. Example of bleed on head texture shown below.

A "bleed" of 10 pixels for a 2K texture, and 20 pixels for a 4K texture is usually sufficient enough to get rid of those seams.  Texturing software such as Substance Painter or ZBrush, as well as other 3D software programs that have texturing capabilities usually have a setting to control the amount of bleed. 

I'm not sure that scaling the texture would be the optimal solution because then you'd run the risk of texture "landmarks" not falling in the right places. For example, nipples wouldn't land right on the torso, and eye, nose, and lip details may no longer land in the right place.