"Time spent doing QA is time not spent writing code" I wonder, is the time spent fixing inane production issues time well spent? Is the time spent by testers/Q

"Time spent doing QA is time not spent writing code" I wonder, is the time spent fixing inane production issues time well spent? Is the time spent by testers/QA to report obvious bugs well spent? Devs, test your stuff like if you were the only one doing QA, and everyone else along the chain should do the same.