Not just power but also Wilder's speed and jab. Szpillika is a great boxer, he did really well; the thing is, you're looking at these guys from the POV of how Wilder is overly terrible and that takes your attention away from the skill of his opponents. If you compare Ortiz to Brezeale for example, how are they different ? One stand out feature is his foot work and movement, he is light on his feet and that is a major advantage on a HW division this era of flat footed fighters, he schooled from cuba and that shows in the technical ability, Wilder is terrible but it takes skill to feint and set up counter punching haymakers, not many of his opponents are capable of that; for years we have seen this and for the same reason it's not jusy me but there has been a consensus in Boxing that Ortiz is a very gifted fighter; however he is past it at this stage due to his age but because of the stylistic challenges and awkwardness he brings the man has been avoided for years by many in the division and that isn't a dig at AJ, Carl Frampton and many others wanted him ahead of Ruiz despite his old age; that's just the respect people have for the technical ability although am agreeing with you that he is done at 50-55 years old, everyone puts fighters specific fighters on the pedestal at times not as a consequence of how they perform against high calibre opposition due to various factors but because they pass the eye test.
Not putting Ortiz in a P4P top 3 but you can clearly see the talent he posses and natural ability over the likes of Whyte, Parker and Povetkin, he may lose to these guys now but because he is a budda and no one can beat age; but when those who pass the eye test step up and face real opposition the fights tend to be competetive see GGG v Canelo or Loma v Linares for example; Ortiz stepped up and was competetive against a top guy, besides Fury I have not seen any other opponent on the brink of almost knocking him out and not just having some moments in a fight and that is also in addition to out-boxing him.
I can never in my Wildest dreams see Parker knock out AJ or Wilder, I would retire from PP and support Birmingham City if it happened

the fight with Whyte was tight but he had too many quiet rounds for me and that battle with AJ was just dead, neither guy did anything at all now if Parker was the A side and unified champ maybe you'd look at it from the same angle and be like hey lets just give him the win, it wasn't a boxing it was just so awful and I'd give it a draw but that's not giving either guy any credit from a performance angle it was just trash and Parker is average, however he has age on his side to get better