The design reasons for adding Randomized Barriers are explained here:
To illustrate how important it has been to Crate: This feature was implemented before the Kickstarter campaign, when resources were scarce. Maybe it was also relatively easy to implement (i.e. a low hanging fruit).
Personally I used to explore everything, too - and I sometimes still do if I feel like it. But it gets old, if you do this all the time, so I appreciate that the barriers provide me with varying directions.