I’m guessing worries over potential licensing issues has nothing at all to do with it. Even if people made tracks extremely close to representing real world tracks, who are they going to waste money and legal resources going after? PD who didn’t actually create them nor is making a direct profit from? The individual also not making any money from and uses it for their own personal use, who likely has about enough money to pay for maybe 1 day of the legal teams time if they actually pursue and win? Sure, people can share videos of what they created on YouTube and get views, but they’re not getting rich by any means from that.
Think of it like the livery editor, where people literally download registered trademarks and images from the internet, upload those registered trademarks and copyrighted materials all day every day to use without first getting permission. How many people have gotten sued so far over the livery editor because of registered trademarks and licensed company logos being used without permission?
Unless PD themselves put actual licensed stuff in the game to use without acquiring said permissions to do so, then it’s not really an issue worth worrying about.
I’m no expert, but there have been plenty of instances in so many different games over the years with the ability for players to create stuff that is very close to (and sometimes exact replicas of) real world things that are licensed and no issues.