Consider software testing a waste? Hear about software "butterfly effect"? Even the smallest change in the initial conditions may cause irreversible changes in the whole system. Are you sure that your development team is able to write an error-free code from the first time? Are you ready to release a product without testing at all?
What does it take for a game to succeed in 2020? What helps product owners save money and users be satisfied with the game? The better is your testing, the higher the quality of your game will be. So, proper testing is key to turn good games into great ones.