1)
Exactly! That was the reason for my highlighting the different treatment superheroes got in TV animation in the 1960s versus the 1970s. The TV animated versions of Spiderman, the Fantastic Four, Superman, Batman, Green Lantern, the Flash and Kid Flash, Thor, Iron Man, the Submariner, and so on (2) were given superbly dramatic treatment in the 1960s, with stories that read like they were coming straight from the comics themselves (in a few cases they were!).
2) There was a collection of animated Marvel and DC shows each within a single series that featured numerous different characters at different times (even the Classic X-Men and the Avengers once) using Jack Kirby as the artist for Marvel's. One even used the classic FF Susan Storm/Reed Richards wedding (changing it to a "UN peace conference"
and writing out the FF!) as the background for showing off the entire Marvel Universe of heroes and villains as they existed at the time.
Then the decision came sometime around 1970 that anything animated HAD to be considered "acceptable to all audiences". Which based on the dreck that came out over the next ten years or so meant anything that might make a sleeping baby wake up and start crying.
Mission accomplished.
I didn't see any changes to that formula until the animated Justice League series (3) done (IIRC) around 1980.
3) When they morphed the "Superfriends" pablum over into a proper superhero animated series in which the Justice League spent most of their time waging battle against the "Legion of Doom" led by Lex Luthor.
NOT pablum.