I understand what you’re saying, but the fact is that computer systems cannot be completely reset with certainty without complete power removal plus allowing time for residual charges to dissipate before power is reapplied. Just ask your friendly computer support tech about that when you are asked to not only “Power Off” rather than just “Restart”, but also to pull the plug from the wall for 10-30 seconds before plugging back in and pushing the “start” button. It would certainly be nice if we had one little “Complete Reset” button in the cockpit that would instantly take everything back to zero, but these are issues of electrophysics, and in the words of Starfleet Captain (Engineering) Montgomery Scott, “Ye cannae change th’laws o’physics, Captain.”
As for the issue of the passage of time resulting in changes in the weather or traffic situation, I think your comment relating that to “get-there-itis” is quite appropriate. Short-cutting procedures in order to save time is exactly how those two pilots killed their passenger. To my thinking, if one cannot subordinate one’s urge to get there quickly to one’s commitment to safety, one has no business in the cockpit. For more on Safety Culture, check the FAASTeam website for January’s Topic of the Month webinar on just that subject, which will be available at various times on various days all that month (including 7pm EST, January 14).