I'm suggesting that Bumble shouldn't be the judge of what messages are appropriate to send or not. But they absolutely should provide filtering tools and feedback to users to reduce low quality or obnoxious behavior.
I don't disagree with you that a majority of women do not want unsolicited nudes. But there's not a consensus or black and white line between messages that are wanted or unwanted. Not all women are puritans, yet big tech censorship tends to push all interactions toward a puritanical moral ideal.
Personally, I'm interested in dating people who are sex positive, kink friendly, polyamorous and open minded. While I absolutely do not send unsolicited nudes or lead with crude messages, it can be hard to find people with a similar mindset when dating apps insert their morals between me and my potential dates.
I'm advocating for sensible filters and feedback, rather than moralistic censorship. Even if a majority of people agree with the morals. The only morals that dating apps ought to be concerned with are that the interacting parties are all consenting adults.