1. The idea that you have to track food and drink is there because not every party is going to have a Druid or a Ranger in it. And if either of those classes are in a party, they not might have the
Goodberry spell or the Natural Explorer class feature. In the party I am currently playing in, my Bugbear Ranger (Gloom Stalker) is using
Deft Explorer instead of Natural Explorer. The problem with Natural Explorer is that it requires you to ask the DM on what kind of terrain exists in the adventure. You can't simply choose a terrain and hope that it exists in the adventure for you to gain any benefit from it. Plus you only gain the benefits when you have been exploring in the wilderness for about an hour. My party also has a Goblin Druid in it, and he doesn't have the
Goodberry spell.
3. Considering the number of people who have complained about the 5e Ranger on these forums, I don't think everyone is beating a path to the Ranger's door just so that they don't have to track down their next meal.
Any mention from WoTC on how One D&D is supposedly going to deal with resource management?