That's one philosophy. The other is that the additional potential field position is worth it. A good kick coverage can fire up the D, and set the tone for the series. Sure, there are risks. Field position and injury are the primary ones, (risk of a penalty is not high, however. The vast, vast majority of penalties on kickoffs are on the receiving team) but there's an upside to it as well.
Not to mention you'll never give your coverage team a chance to force a fumble. Or for a returner to botch the catch. While these aren't common occurrences, I do think they are possibilities that you have to include in the pro-con equation.
It seems pretty obvious that CPR is comfortable with the high kick/cover strategy at this point. Given the change in the touchback rule this year, I think it's worth it to see if you can gain an advantage by actually letting the team return the kick. If it ends up not working long-term, you can always go back to blasting the ball through the end zone.