Yes, exactly. Unless you're selling the item. You tell someone the SM is effective, worth their time and effort, you're lying to them, hoaxing them, defrauding them (figuratively). You tell yourself it's effective, worth your time and effort, you're defrauding yourself.
That's my claim. It remains my claim regardless of what language you use, and regardless if you struggle to manage literal versus figurative usage. Taxonomical or definitional objections don't really touch the essence of my claim.
Maybe it's time to draft my monograph on the worthlessness of appeal to dictionary in a debate between peers.