It would take time in the court for people to figure that out and they would use ill-granted patents like a hammer.

Indie: Release a new game with unique catching mechanic

Nintendo: “REEEEEE! We have valid patent, so give us all of your profit, assets plus penalty or we will sue you to make you die poor like that one Gary Bowser over there.”

Indie: “WTF?”

Even if Indie developers try to fight in court, they’ll spend multiple years, hundred of thousands of dollars in legal fees and on top of that, because Nintendo have a patent that was stupidly granted by patent office, they can argue on a ground that their lawsuit is not frivolous.

Valve almost died as a company, because of those sort of people before if you watched their documentary, they only won, because the mega-corporation emailed about destroying the evidence.

Way to dishonor Katherine Johnson, Christine Darden, Mary Jackson and everyone else who were women and/or those who were of different race who helped us get to the moon and back.