F is not scarcer than J on that night compared to global F:J supply ratios yet selling faster. Hence demand for F is greater in proportion to supply than J. How are you disagreeing with that?
We must not be understanding each other.
F service from TLV-NYC the days immediately following Sukkos is very, very limited. One airline, few flights. That's it.
There are people who are going to be in TLV over Sukkos who only wish to fly F. The fact that J is open is irrelevant to that group of people. As you can see from loads, there are likely more people wanting to fly F during that period than there are seats for sale.
Comparing this very atypical period to "global F:J" routes is a red herring which doesn't help to prove your theory that TLV is a strong F market.
You simply cannot extrapolate any meaningful data from what is perhaps the busiest travel period of the year ex-TLV... aside from proving that F sells well during that period.