Caching and status codes

[Leo]

> > Clients are going to cache, like it or not.  Some already do.
> Rude clients are going to cache, yes.

I don't understand why a client caching responses is rude. Or rather, I
don't understand who it is being rude to. When I configure my HTTP or
Gemini browser to cache every response, is my browser now being rude to
me? Is it being rude to the server?

How can something that causes less resource usage on the server be rude
to the server, or something I configured or downloaded as a "client that
has caching" be rude to me for using it?

Is not doing everything a server sends being rude to the server
operator? If a server sends a 100000000x100000000 image, is my image
viewer being rude for refusing to decode/display it?

--
Leo