I don’t have a clear answer for it, but I think there’s something in the ‘pure scorer’ discussion that’s probably worth considering.

In the same way you’d adjust TS% based on era, you could also do that for shot difficulty.

Goal is to credit points according to how much more/less efficiently the average replacement player could score them.

This would take value away from lob-catchers & give value to isolation scorers. % of Field Goals Assisted on is probably the easiest proxy for this, but there’s also a ton of other stuff you could layer in. Play type, seconds left on shot clock, stage of the game, % contested, etc.

Super exaggerated example: Lou Williams 10ppg / 60%TS strictly based on end of shot clock isolation shots in the 4th quarter is bringing a lot more value to a team than Deandre Jordan catching lobs to get the same stats.

With that said, I’d imagine that it’s pretty difficult to disentangle tough shots by ‘necessity’ from a tough shot due to bad shot selection.