Why would you not care about H/9? It indicates the stuff of the pitcher in question.
If a guy's got a H/9 over 9, he's remarkably likely to be chaff. Put another way, Luis Castillo, Tyler Mahle, Aroldis Chapman, Nick Lodolo, Hunter Greene, Graham Ashcraft, Alexis Diaz, post-Driveline Tejay Antone-- the most successful pitchers developed (even in part) by the Reds aren't all high K guys. They aren't all low BB guys. They haven't all had smooth sailing through the minors.
They have all been hard to hit.
Now, I realize that's not fool-proof-- Robert Stephenson's minor league career H/9 of 7.1 says hi-- but it's a pretty solid indication you're not dealing with the Sal Romanos and Cody Reeds of the world, but are focused instead of a higher grade of stuff.