The earth is finite, yes, but places to dump our waste exist in abundance for the foreseeable future. There are enough permitted sites in NY state to handle the waste from all 50 states if we needed them. Dumps are efficient and safe. You can build on them. Most of the old cities in the world, are after all, old dump sites. You can get useful fuel from them ( methane ). If properly designed, as all are these days, with leak detectors and liners, they present no risk to the water table. This was the only real problem with the old dump sites.
Tell me how many people have died from dumps and land fills in the last 30 years. Probably less than the number of unwanted babies and mobsters dumped into them for other reasons. Dumps have had a bad rap.
First I need for you to tell me how many people live on reclaimed dump sites.
As for the "forseeable" future, I do keep in mind that I have children who, God willing, will one day have children of their own who, God wiling, will have children of their own, etc. I don't see the population of the US shrinking drastically in the forseeable future, if it declines at all. More people, more trash. More landfills, less land available for living. So what if I recycle? Its not like I'm doing a bad thing, and I'm not wagging my finger at those who choose not to recycle. But I don't for a second believe that landfills can be safely reclaimed.
As for unwanted babies and mobsters, they are dead, or soon dead, once they hit the dumpster or landfill. They didn't die from living there and nobody claimed that they did. I bet their life expectancy would be drastically reduced, however, if that's where they were living.