I don't regret having the surgery even though I'm not dealing with a joint infection. The quality of life since I got the replacement was worth it to be able to walk, drive, and even dance pain free. I regret not going back to running. I would suggest take advantage of any health and PT opportunities that you can to strengthen the muscles and joints before deciding and going into surgery. Move toward if not maintain a healthy weight and diet as it will decrease risks of infection and increase your recovery time. Consider building muscle, endurance, and strength that will also aid you regardless if you do the surgery or not.

Also, consider options you may have as to alternatives to surgery and surgery techniques. Even though my weight, my surgeon did the anterior approach which doesn't have as many restrictions that the posterior and lateral approaches might. I was able to bend over, cross my legs, or mostly anything that was weight bearing. I believe all approaches would not allow you to submerge in water (tubs, pools) , high impact like running etc for at least 6 weeks, but that is also a discussion to have with your surgeon.

Also, follow every pre-op and post-op precaution carefully and thoroughly. There's a very small risk to infection, but it can and does happen and anything you can do to avoid it, do that.