I understand these rules are for our safety and I am appreciative of them.
I have serious back problems and my dr. told me when I travel, I HAVE to have a pillow behind my back. I guess I'll roll up a towel but it just isn't the same. Why are blankets and pillows okay for the first segment of the flight?
Because, IMO TSA hasn't clearly thought through the implications of this knee-jerk policy.
This policy goes beyond reason because not every traveler is a virile, healthy adult. IMO there are many physical limitations that weren't considered.
What about bathroom use for older travelers, children, pregnant women, persons with disabilities, someone who might become ill? Everyone has suffered from diarrhea at some point. What if this happens during the last hour of a flight? What if it happens to a child? (I'm betting it WILL happen to someone.) Will TSA detain and question these people?
People who suffer from osteo-arthritis or rheumatoid arthritis should not remain immobile for an hour. And, you mention your back problem and the necessity to use a pillow behind your back. What about someone with an injury that needs to keep a limb elevated?
AND, referencing no access to the overhead bin, what about the baggage under the seat? No one has mentioned this, so I assume passengers still have access to this.
Again, this is, obviously, a policy that has not been well-thought out.