Music production, just as any other profession, works through a lot of convention. Most music has more things in common than not, just as most software or most humans have more things in common than not -- and that is completely fine. If something falls in the 95th percentile then it's probably a good rule of thumb to not mess with that particular rule, if your goal is to get something going.

There is a ton more to music than chord progression. Figuring out which parts to change, and how, and which parts to leave alone is key.