Valid, but if enough hours are missing, it's at least possible it could delay something...i.e. an assignment requiring X IP hours or something like that. But yes, that's probably a far-fetched possibility.
As far as I know they do and have heard they do the fighter time factor thing. I still have a copy of my flight records, so no worries there.
This is where my opinion differs. I've done a handful of records reviews so far and to be honest, I will have no idea if my records are missing some flights here and there, mis-transcribed type of flight time off my 781, etc. It's humanly impossible for you to go, "hey wait a minute, 169 days ago on Feb 3rd I flew a 1.2 and logged .8 NVG...please fix this" as you're flipping through multiple pages of flight time. With a logbook, I can quickly just look at the totals and if something doesn't match up, now I can run through dates and see where a flight's missing. I have already caught a couple mistakes and pointed them out to the SARMs. Maybe it's amazingly different here, but they trust my word as an officer. What a concept. I would hope nobody would make shit up to pad a logbook...complete BS and I would not expect someone to do that.
Bottom line, now that I backlogged all my flight time, it literally takes me 15 sec to fill it out after a flight. So, I spend approx 2.5 min per month writing in my logbook. Just my opinion, but I'm not worried about "wasting" 2.5 min out of my month. That's like the dudes arguing in favor of green boots because they don't have to shine them. Copy, I'll "waste" 2 min to shine my black boots once every 6 months...again, not worried about it. If someone else is, then don't do it.