#4. It's a proven draw
Whether you're a fan of it or not, the entire "power couple" angle has been drawing a lot of attention and people are talking about it. When it's something that fans are interested in and it's something that fans want to see, WWE will do what they can to give it to them.
Even if you're not a fan of using them as a couple on television, what it does is it helps attract casual audiences. The entire idea of two champions as a couple undoubtedly draws fans in and there will be a higher level of interest in the match at WWE Extreme Rules 2019 (though the build to it will determine everything).
Hopefully, WWE doesn't make a mess out of the build and we can have a good match on our hands. Will it deliver as it should?