Welcome to yet another way to tell people to just shut up about philosophical issues beyond the predictable formulaic Loser Dude remarks in social situations.
What is a person doing when they assert the truth or reality of illusion?
This is similar to the idiotic rhetoric thrown around about everything being a simulation, and is equally bogus for the exact same reason: fatal self-reference error.
Again, the Magic Question is:
How does that universal claim impact its own truth?