I've never really been fine with delusions don't encourage delusional thinking and having had an alcoholic mother with bouts of delusional thinking it's more exasperating and triggering me to be mean.
I see some level of encouraging delusion to be required to talk with anyone, like learning their mind's language so that you can speak with it instead of them tuning it out or misunderstanding it. I've found keeping it to around the speculative range allows them to ask the questions they might not be asking themselves, but that in order to do so you need to know enough of the material. Building an environment of questioning typically inspires the gesture to continue, and questioning yourself is the path towards introspective lucidity.
I don't believe in encoury the delusion in any way but yeah okay i hear you about working *with* it.