I wonder if this style (molecular level) of self healing will ever prove viable on a large scale. It's interesting to compare it to natural self healing system

I wonder if this style (molecular level) of self healing will ever prove viable on a large scale. It's interesting to compare it to natural self healing systems, which heal on a much higher scale (cellular). The obvious difference is that artificial materials are molecularly homogeneous. But that homogenity precludes auto-determination of high level structure. For example, my car paint may self heal, but it won't necessarily heal into a uniform coating because the individual units (in this case molecules) aren't guided to specific positions. In contrast, biological systems are much more robust because the placement of individual units (cells) is guided by a larger system. That's why we still have a long way before our creations are truly 'self-healing'. Material science may ultimately not be part of the answer.