The ratcheting mechanism does not cause timing chain problems, on the contrary, it prevents them. If the chain does stretch, the ratcheting tensioner takes up the slack and prevents it from "whipping". It would take enough stretch to warrant chain replacement before there would be a noticable power or economy degradation. If it's stretched that much, I agree, roll in a new one.
Frequent oil changes prevents timing chain stretch, it cannot heal it.
Have a great day,