it is neither, they (and by them i mean all the idiots following Craig Scammer Wright) are trying to convince people with a dishonest narrative that users not only don't need to but also they shouldn't run full nodes. basically it tells them that they should rely on centralized services only.
the purpose is to justify the ridiculous block size of bcashsv (2GB) that is a fundamental flaw, and prevent any argument against it such as "users can't run full nodes if blocks were that big" before it starts.