A marriage requires work. It's what our parents tell us. It's what Hollywood would have us believe too. But is it really true?
There are many flaws in the phrase. There's a reason we call our jobs "work": we have to get paid to do them. We wouldn't do them for free. They are difficult and time consuming and frustrating and boring. Every now and again, they'll be kind of fun. But that's not the norm – most people are just doing the grind and waiting to get back to their "real" life.
Nobody gets paid to be married (unless you're literally only marrying for money). Marriage can be difficult, frustrating, and feel time consuming. But in a good marriage these feelings are acute, not chronic. They're not work. And as for boredom? If your marriage is boring, well, you probably aren't a natural fit for each other – or aren't a natural fit anymore. Even the quiet times – the Netflix binges, the reading in bed, the going for walks together – they're at least somewhat fun, aren't they?
Marriage isn't a fairytale. There are certainly unrealistic expectations out there for it. You don't walk around the house in beaming love with each other 24/7. But to call it work insinuates you'd rather not do it. And if so, why are you married at all? You certainly don't have to be.
I believe that telling yourself "marriage is work" will make you appreciate the good things in it less. It focuses your energy on the negative things in a relationship, and allows you take the positive things for granted.