Question, who from the Marvel Studios side was involved in Inhumans? Taking a quick look at the production, the only crossover between them seems to be Stan Lee, who seemed to get a credit for everything Marvel. Otherwise, the only people seemingly listed to be Marvel Television personnel. Same with Daredevil, which seemed to be Marvel Television personnel and the showrunners, but otherwise, Marvel Studios personnel or execs didn't seem to be involved.
Agent Carter at least had Feige, D'Espisito, Markus, and McFeely are involved in a producing capacity, while Agents of SHIELD had Sarah Halley Finn involved with casting.
But the post I quoted, was saying that if Cox appears in Spidey 3, then people will go back and watch Daredevil, like people did with Peters and the Fox movies, and that means Daredevil would have to be canon. But by that logic, if people went back and watched Peters' X-Men movies, wouldn't that mean they would be canon to the MCU, even though the finale just indicated that's not the case?
I honestly don't believe a lot of the general audience, the ones who these films are for first and foremost, think about the Netflix shows as being canon or related to the MCU. They likely see them no different from Sony's previous Spider-Man films, or Fox's X-Men films, or Fox's Fantastic Four films. Just other interpretations of the Marvel characters.
WandaVision since release has become one of the most talked about and most viewed shows in the world, something the Netflix shows unfortunately never managed to do. It would seem people know that WandaVision is connected to the movies, it will impact the world going forward, and matters. It would seem the general audience never thought/believed that about the Netflix shows, or really any of the Marvel TV shows.
With Simmons, Peters, and confirmation from the trades that Alfred Molina and Jamie Foxx will be returning, it would seem Marvel Studios is okay with reusing actors for a role, but doing their own take on them, rather than inheriting works they had little involvement with.