I have a whole "chop wood, carry water" speech born from leading corporate software teams. A lot of work at a company of sufficient size boils down to keeping up with software entropy while also chipping away at some initiative that rolls up to an OKR. It can be such a demotivating experience for the type of smart, passionate people that FANNGs like to hire.

There's even a buzzword for it: KTLO (keep the lights on). You don't want to be spending 100% of your time on KTLO work, but it's unrealistic to expect to do done of it. Most software engineers would gladly outsource this type of scutwork.