Could having one knee surgery always lead to more knee surgeries due to the weakening joints?

Likely: At this time, orthopedic knee surgery can't cure the problem. Generally the offending agent is removed (like a meniscus), although sometimes it can be repaired. Once tissue is removed you will begin the cascade of arthritic conditions and may need future surgeries. Consider platelet or stem cell therapies to see if that can help without surgery. check out Regenexx.Com