Every relationship is different, and there will be different relationship norms for everyone. It's one thing to tell people that you should act professionally at work, but please don't project your marriage onto others.
It would probably be fine.
Of course, it's all a threshold game; if you're strong in other places you can get away with things that are technically a net negative, but you've got the buffer to deal with it. Every marriage if not every relationship does that since none are perfect.
But why blow the buffer on something so trivially stupid?
It also isn't really about "marriage strength", either, it's about basic human psychology. If you're talking about it, you're thinking about it. If you're thinking a little bit about it, your subconscious is chewing on it more than you realize. The most important message discipline is with your own subconscious. Don't feed it prompts you shouldn't. Even if you "get away with it", it's not free.
I don't think that I need to hack my psyche to ensure I don't accidentally trick myself into wanting divorce.
But my initial point stands. If you don't want to joke about divorce with your wife, then don't. My issue is with stating it as fact that other people shouldn't either.
There are very few "always apply" pieces of advice for these incredibly complex and distinct relationships, but we love to apply our single data point to the entire universe anyway.