I agree. Endgames skills are necessary to play the Catalan and the rest of Wojo's rep was aimed at creating clear (easy to play?) positions. I am a big fan of Wojo and wish that there were a Chessable course on his white rep.
Opening with 1.Nf3 and Wojo's Weapons
Sort:
I have recently quickly skimmed Wojos 1-3 volumes - many lines end up with lots of offering queen exchanges for a slight endgame advantage - .may not be to many players' likings. If you need to take up his repertoire, better brush up first on endgames and even NQEs (not quite endgames - with 2 pieces per side).