It looks like you're new here. If you want to get involved, click one of these buttons!
Because we don’t serve up encounters, we have the hobos exploring a world.
5e does have encounter building rules, doesn't it? They're on that page of the DMG opposite the picture of the giant ice cliff, if I recall. With the easy/medium/hard/deadly XP bands.
Cute, but no. It seems pretty clear from the books themselves, the modules/adventures, and the play culture of modern D&D that "encounter chain" is very much the expected/default mode of play.
Now, there are some things in 5E where the looseness of the design is a bit problematic. The fact that every group has to figure out exactly how they want to handle Perception vs. Investigation, and Perception vs. Insight, is a problem.