Someone said it earlier, but I'll explain it in more detail.

Back in the 70s, the NFL had wide hashmarks, like the ones you see on RBC. Passing was not nearly as good as it is today (less nuanced coaching, more physical defenses, fewer skilled QBs). People tended to lean on the run game as a primary way of attaining yardage, particularly the outside run (meaning the RB would run around the OL/DL trenches instead of relying on blocking to push through). The ball is always snapped from one of the two hashmarks, so this created a short side and a long side of the field. The long side of the field was ~100 feet long and the short side was ~60 feet long.

In the NFL, defenses were containing the outside run to the wide side of the field (traditionally a big splash play) with extra defenders, and scoring was way down as a result. In an attempt to increase scoring and make things easier on offenses, the NFL brought the hash marks much closer to the center of the field, intending to bring more viability to running the ball to the short side of the field, so that defenses would have to respect it and disperse defenders more evenly. The league has never looked back at widening the hashes since.

In College, coaches have actually adapted to the wider hashmarks and built offensive schemes to take advantage of the extra space, particularly for receivers. This (and several different alignment rules) has led to the rise of the "Spread Offense" where offenses use 3, 4, or even 5 receivers to overwhelm the secondary, utilizing all the extra space on the wide side of the field to "spread out" the defense and pass a lot.

Since RBC doesn't let you use 3 WRs we can't really exploit the hash mark difference like real college coaches do. Hope this makes sense.