There are private IRC channels (password protected or invite-only) as well as private messages.
if it's public: who cares, and if it isn't: why are people trusting random IRC server admins
especially when there have previously been leaks from places like EFNet where admins have been caught running tcpdump or ircsniff.pl
e2ee means that you do not have to trust anyone
> if it's public: who cares
IRC also lacks end to end authentication, the server owner can pretend to be you.
Fortunately, there's OTR, but client support is limited.
I wish the new ircstandarization efforts did work something out about e2e, at least for private messages.