Most pro bowlers are 3 stars
Well, duh.
"And while the 54 percent of the Pro Bowlers were rated three-stars or below, keep in mind that since Rivals began ranking players in 2002, over 90 percent of prospects fall into this category. To round off the numbers, there were about 51,000 prospects ranked three-stars or below and 4,680 ranked four-stars and above. So the 42 players ranked three-stars or below had a less than 1 in 10,000 chance to reach the Pro Bowl, while the highest ranked players had a 1 in 250 chance. So while seeing a decent amount of ‘under-ranked’ players reach the Pro Bowl may lead some to conclude rankings don’t matter when it comes to achieving greatness, further analysis shows otherwise."
https://n.rivals.com/news/by-the-numbers-2017-pro-bowl-rosters