There are a lot of compromises in our body design to support breathing air. One is the risk of aspirating food, which kills lots of people.
Or does "no free lunch" mean the drastically broader (and perhaps unfalsifiable) claim everything in the world has ramifications?
Maybe it depends on the context.
But like if someone who enjoys doing programming happens to find and fixe a bug in some software and then everyone can get the bugfix with the next update and the update was going to happen anyway, then the bugfix can be free. It can be 100% improvement, no compromise, no cost, nothing externalized. If you want to argue otherwise, you end up with the same form of argument that is the same logic as the reductio ad absurdem point that we had to have all the costs of the world existing in order for that programmer to be there and do the bugfix.