The sloppers are diving head-first into a world where not knowing how a basic idea translates to code is embraced. This is not true of every slopper, but it is true of enough that sloppers are a threat.
The problem is you've redefined LLM-coding as slopping. "This is not true of every slopper".
I'd venture to say that a large number of developers are using LLM tooling at this point. Not all of those developers are out there generating massive, poorly engineered PRs and wasting project maintainer time. For me there are at least those 3 broad categories of user of LLMs for software development, maybe more if I sat and thought about it for a while.
Note that a ban on LLM-generated code is not a prohibition on other forms of LLM-based assistance. Those other forms don't incur a direct burden on the maintainers.