It isn't, actually. The comment I responded to, and the one it linked to, are broadly criticizing the sensor fusion/control loop implementation--the thing that saved Ingenuity after the optical flow subsystem started returning bad data. That's what's being discussed here, in the context of this subthread where I entered it.

The dropped frame thing is much more cut and dried, and it's obviously a bonehead mistake. It's also the kind of thing that's always going to happen, as you say. Many of the commenters here seem to be generally at odds with that reality--I don't believe the state of the art in software development has yet achieved guaranteed bug-free implementation of diverse real world applications, but you wouldn't think that from reading some of these comments (e.g. the one you linked above).