Speed of NRL and pressure on halves a lot greater than lower grades too.
As a run first player Connor probably looked up and decided if he could run or not and if he couldn't he has time to assess his pass.
In NRL he is out of time and needs to rush his pass.
Missing like three seasons with ACL reconstructions probably didn't help him hone his passing skills either.
While centre looks like an easy position to typically pass because it's just always to the one dude outside you, it is commonly a fairly tough pass.
Typically you are trying to finely execute a draw and pass, at speed, without running your winger out of space.
Certainly not all of the time but you definitely see people call for the centre should have passed when realistically while the winger did have a moment of space, it was closing very fast from sliding defence.
At full sprint unless you can execute perfect pass to catch that moment the centre may very well be better cutting back on inside to try and beat that slide. While Katoa is a great finisher the sideline is always a perfect defender, there is a point where Ramien is better off trying to bully through two or three imperfect defenders than getting Katoa jammed up against the sideline with no space to work in (near the line he doesn't need much).
Where that point is depends on how conservative you want to be (especially on earlier tackles).
Getting that point right live at full speed, not so easy.
In Ramien's defence also assuming he is right handed it is also his non preferred passing side, so he needs to be at full speed, read the defence, read his wingers positioning and opportunity, and execute a bad-side pass. If he could nail that to perfection every time he'd be playing 6.
Relationship with winger another factor, a little too deep or a little too shallow from what you expect and the window of space is closed by the time the winger reels the ball in, or it is a turnover.