Funny that you mention Monty Python, they almost had to cancel the production of The Life of Brian since their original financier was apprehensive about the the film's content making fun of religion.
George Harrison of Beatles fame ended up funding the movie, I believe almost entirely out of his own pocket. This was back in the 70s.
The same was true for the holy grail too. Other financiers included (iirc) led zeppelin and other British rock greats.
The top marginal rate of income tax was ~90% and this heavily encouraged investments like this. It meant that there was more space for creative risk taking as well as more commercial/industrial capital investment.
The Beatles funded some very weird stuff. Ringo Starr in The Magic Christian is probably the best example, an extremely on-the-nose set of satirical sketches.
There was no one suggesting that the scene but cut, it was a clickbait-like appeal to the reactionary press to get some extra awareness of the project out there. And it worked.
It wasn't “someone has suggested/demanded it be removed, and we have refused” but “if someone did suggest/demand it we wouldn't”.
Monty Python was only ever possible with something like the BBC. There's no way a commercial network would have taken a risk with it, and even more so in the USA. Its popularity in the States began underground, with PBS affiliates getting the ball rolling in the 1970s. There's no way that major networks would have run the show, even in a late-night slot.
Back then, the short late-night voiceover, "Portions of the following program may be unsuitable for younger or more sensitive viewers," was the hallmark of Quality TV.
George Harrison of Beatles fame ended up funding the movie, I believe almost entirely out of his own pocket. This was back in the 70s.