You've overstated it, but there's a grain of truth there.
PSU fans seem to want to elevate Cael to mythical proportions because PSU has won national championships in recent years.
To downplay the importance of getting top tier recruits is disingenuous and common with PSU fans. Mark Hall was 'developed' into a true fr national champ through Cael's magic coaching ability. Give me a break.
Each year there are some very elite HS wrestlers... some years the top couple of guys or maybe the top 5-10.... guys that realistically could be multiyear AA's and a good chance at being national champion. David Taylor, Metcalf, Retherford, Varner, and Steveson all fit this description. If you can recruit guys like that, you will be successful, with competent coaching.
Here are the facts....
Cael never won a team championship during his time at ISU, either as an asst coach or head coach. The number of top 10 recruits he got was quite small at ISU, certainly nothing like at PSU.
Fast forward to Cael at PSU. For years now, PSU has been getting multiple top 10 guys. No other school comes close. Surprise.... PSU starts winning championships.
Cael is a good coach, but when you're starting with the best of the best, it's a lot easier to bring home team titles.
Cael has recruited like no one else in wrestling history. That much we know. How he does it is something of a mystery to non PSU fans, so questions arise. And how well kids actually develop under him is not so obvious, at least compared to other top d1 schools.