these are all games that released before the HD era, that would look like ass on an HD screen.
FFXIII came out on PS360 and PC,
you can not compare this
to PS2 and PS1 games being rereleased on consoles that are designed for a completely different kind of TV Display technology.
actually improving these graphics would be a gigantic undertaking... and improving character models here would not do much either as they are already really good and look absolutely fine on a 4K screen.
so you can't just take old PS2 games... and Life is Strange, which looked and ran like complete diarrhea in the original version, to FFXIII which was a graphical showpiece at the time and still looks very good.
those other Final Fantasy remasters you mentioned look like shit, even after all the improvements they still look like shit on a modern TV. so not even remotely comparable