Yeah, that's true.
I've seen poly relationships last a long time; I'm not comfortable with it, and wouldn't do it myself, but I can see that it can work for some people. I've also seen couples who decide to become polyamorous, and it's almost always one person who became bored, wants to move on, but hasn't been able to manifest the bravery needed to break things off.
I'd heard Drew talk to people who called in, asking if it was OK to be in a poly relationship, and I think he never said no. Some of those callers wondered if they'd ever convince the object of their affection to become monogamous, Drew said that's a bad idea, and I agree. However I feel like he also said the thing in converse situations, where a monogamous target would have been encouraged to try polyamory, and Drew thought that was a bad idea as well. It always felt like Drew just wanted people to know ONE PARTNER and also KNOW WHICH GENDER YOU LIKE... It felt really locked down.