Completism: New Rules? (Patreon)

A while back, I decided that cinephile completism had to have limits. This was mostly around film festival slates (Cannes, NYFF) that included movies I considered to be unwatchable. But now, I have a new conundrum.

Earlier today I started watching Beyond Therapy, a 1987 film by Robert Altman. It is every bit as horrible as its reputation would indicate. But do I have a duty to watch it simply because it is Altman? Does every great director deserve to have his/her duds viewed in due course?