Very true. One way the plastic surgeon would handle breast hardening was to squeeze the breast to try and "pop" the scare tissue that begins to grow immediately around the breast. In some cases only part of the breast scar tissue would "pop" and the breast would appear oblong and bruise quickly. Very painful for the patient and very stupid.
But scar tissue is the main enemy of implants. It can tighten up the implant to the point of rupture. I've seen it happen.