Binyamin Dissen wrote:

: Everyone is now sitting in a secure seat.

Assuming facts not in evidence.

: So why does the plane need to make an emergency landing?

Why did these seats get loose? If these seats got loose, how likely
is it a systematic flaw and other seats will be following?

Simple reasoning.

Statistical probability.

You have a plane with probably at least 70 seating units (each unit
consisting of a row of 3 seats).

If there was a systematic flaw, the likelyhood that NONE OF THEM were
detected as being loose DURING BOARDING or taxi for take-off is pretty
much zero.

Secondly, in the air, the crew would have (or should have) checked all
remaining seats for this condition, in an attempt to relocate ALL
passengers sitting in unsafe seats. We can logically presume this
happened.

It can also be assumed that the seats did not become loose at any point
- they were loose (not properly fastened to the floor) to begin with.
Any other condition (such as they were secure and became insecure) would
require the invention of self-unscrewing or self-detaching fasteners.
In other words, it would have been irrational to assume that seats
initially found to be secure would have at some point in the flight
become insecure.

Also, the media story was sufficiently detailed and did not say that
some passengers were forced to sit or remain seated in loose seats.

Hence there would have been no rational reason NOT to continue the 1.5
or 2 hours remaining to fly to the original destination.