IMO, the Ranger's tracking ability seems to say that the Ranger is automatically great at tracking, rather than that others cannot track. It says that the Ranger automatically succeeds under many circumstances. The way I'd rule it is that where a Ranger automatically succeeds, other characters would have to make a check. That seems to me the intent.
I think that was the intent as well. My beef is that tracking is a pretty common activity in games. Right now, if a character wants to track, the only rules that cover that activity are in the Classes pdf, as a class feature for a single class.
Since the word "tracking" is not mentioned anywhere else, the implication is that only rangers can track. Under literal RAW, neither the Bounty Hunter ("You track down and capture fugitives...") nor the Guide ("leading others along rarely used tracks and paths.") can even attempt to track, unless they're also a Ranger. No more than a Fighter can attempt to Channel Divinity.
Or unless the DM and player use their own initiative, and create their own subsystem for a Wisdom or Int ability check. But that subsystem will either A) vary from the Tracking rules listed in the Ranger feature, or B) match the Ranger feature's rules, which dilutes the value of that feature / essentially means the Ranger doesn't get a 1st level class feature.
Experienced DMs and players will get past this in an instant. "Let's see, let's go with a DC 15 to track somebody, and -2 to the DC for each additional person or favorable condition, and +2 to the DC for each inclement situation like time, weather, terrain, or whatnot. Make a Wis or Int check."
But new players? Players who have never played a tabletop RPG? The rules should be written with them in mind. Or at least, organized in such a way that a newbie can easily figure things out.
My wish would be for the "Tracking" feature to be renamed "Expert Tracker", and then reference how that feature interacts with a the general Tracking rules--which would be located in How to Play or Backgrounds and Skills.
It's mostly an organizational/conceptual issue.