They are baseless because age isn't a great indicator for the quality of an opponent. For instance, Fury, Usyk, Wilder and AJ are likely all past there prime but there still great fighters. Age doesn't not equal gate-keeper, that's why you're opinion is baseless and surface level. You aren't basing the opinion on credible evidence nor are you taking the variables into consideration. Ortiz, Povetkin, Pulev, and Wladimir were quality wins even at their age because of their ability to perform. Pulev after getting knocked out by Joshua easily beat Jerry Forrest, who just got a draw with Hunter and Zhang. Boxing isn't fought in number's but in the ring so that's ultimately how you measure a fighter.
Furthermore, plenty of journeymen have power but cannot achieve anything Wilder has. Wilder has certain skills, such rthyme changes, which are highly affective.
Finally, Cunningham a credible win at heavyweight? Debatable but overall yes. Cunningham was a cruiserweight champion so he's obviously a skilled operator but did relatively little at heavyweight. It's like is Juan Carlos Gomez a credible win at heavyweight for Vitali or Dwight Quai for Foreman? Possibly depending on the context.
Furthermore, plenty of journeymen have power but cannot achieve anything Wilder has. Wilder has certain skills, such rthyme changes, which are highly affective.
Finally, Cunningham a credible win at heavyweight? Debatable but overall yes. Cunningham was a cruiserweight champion so he's obviously a skilled operator but did relatively little at heavyweight. It's like is Juan Carlos Gomez a credible win at heavyweight for Vitali or Dwight Quai for Foreman? Possibly depending on the context.
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