nostr is freedom, thats nothing that forces slogans in feeds. The cure for that situation is "more non-slogan contents".
Having "less slogan-contents" or "more anti-slogan complaints" dont change anything; you can opt-out from them in any moment, they cant hurt you.

Slogan in my opinion are inevitable, is a social field where community review continuosly what informations are propagated and rejected (most memes are just slogans, compact ways to encapsulate and trasmit simple messages to much people).
Slogans tells a lot about a community, and if it works well, his slogans would be never totally incorrect, but mostly correct in all the cases (and ever cringe).
Bitcoin maxis slogans are in my opinion high quality mostly correct euristics, and its good to have them.