To return to the question - consider you're on a bearing 190 from the station, tracking north.
Select 045 on the HSI. The needle will show fly left, with a TO indication. When you approach the 225 radial it will gradually come in until you're on the radial.
Go back to somewhere out 190 from the station. Now select 225 instead. You will now get a fly right on the needle and FROM pointer showing.
But what's a "fly right" on an HSI? The beambar is displaced to the (top)
left side of the instrument, just as it was in the previous case. As I hold my track, the beambar moves down and right and comes in when I'm on the radial, just as it did in the previous case.
If I were to hide the arrowhead and the TO/FROM flag I'd have no way of distingushing between the cases with a VOR. Whichever way round it is, it allows me to establish northeastbound on a line running through the VOR in the orientation 225-045, with the same actions in response to the same beambar movements. What it doesn't tell me, unless I look at both the arrowhead
and the flag, is which side of the VOR I am.
Do I use an HSI that way? No. Is it easier to fly like that? No. Is it possible to fly like that? Yes.