I'm not saying He CANNOT count the hairs, I'm saying He DOES NOT, but if He so chose to, He could.
I don't know that we can actually know whether you are right or not in saying "He does not." Maybe He does choose to, and thus, when Jesus said "the hairs are numbered", it would appear that He would be either lying or mistaken if God had not, at least once in recent history before Jesus made the statement, actually numbered them for all of those in attendance.
[Mat 10:30 KJV] But the very hairs of your head
are all numbered.
[Luk 12:7 KJV] But even the very hairs of your head
are all numbered. Fear not therefore: ye are of more value than many sparrows.
There's no reason at all to think that God keeps a running tally of the number of hairs on every person's head.
Yes, Jesus saying that the hairs "are" numbered is a very good reason to think God was keeping a running tally. Else it would seem He merely counted the hairs just before Jesus made that statement, just so the statement would be true, and thus the concept provides no comfort whatsoever. If God only numbers our hairs for an instant during a speech, with no thought or care at other times for the person whose hairs He is numbering, then He doesn't really care for us as much as for sparrows.
As you said above in Post #32, God numbers them.
Yes.
That's different than having a spreadsheet of all humans and constantly updating that list every time they grow a new hair or lose one!
I don't know about a spreadsheet, or even all humans, since the listeners at the time would have been a select group. But again, if the point of the message was to comfort the hearers, and the comfort was only applicable to a short time frame, there's really no comfort at all.
Looking at the passages, Matthew's was directed at the 12 apostles, and Luke's was addressed to "my friends". So the number of heads were limited. And perhaps the timeframe wasn't unlimited, either. They were being sent out among those who might "kill the body". So it could be that just for this particular time, their hairs had been numbered, in order to determine whether they were harmed by some city or other. But I don't see why it might not apply every time the apostles were sent out, including by the Great Commission, which seems to have been a permanent sending.