My "interpretation of it" is explicitly in the document.
"Therefore, the NTSB recommends that the FAA require Boeing to determine the critical fan blade impact location(s) on the CFM56-7B engine fan case and redesign the fan cowl structure on all Boeing 737NG-series airplanes to ensure the structural integrity of the fan cowl after an FBO event. The NTSB also recommends that, once the actions requested in Safety Recommendation A-19-17 are completed, the FAA require Boeing to install the redesigned fan cowl structure on new-production 737NG-series airplanes. The NTSB further recommends that, once the actions requested in Safety Recommendation A-19-17 are completed, the FAA require operators of Boeing 737NG-series airplanes to retrofit their airplanes with the redesigned fan cowl structure."
Is your position that somewhere in this 193 page document, the NTSB buried a line that says "just kidding, Boeing is faultless here"?