I don’t think pros can do it either, but I think they don’t base their positional judgement in the opening just on counting territory.
Pros have a strong sense of what kind of exchanges are even (no net gain or loss), so when both players play that kind of good moves, they just assume the score doesn’t change. Only when some potentially unfair exchange happens, they would investigate to assess any gain or loss in terms of efficiency (shape + aji + tempo + influence + territory) from that exchange.
Tewari analysis is an important tool to make such exchange assessments during early game development and middle game fighting. A dubious exchange would lead to a sense that a player lost a bit (like 1 or 2 points), which cannot be recovered easily.
I think that only when the endgame started, all the territories are sufficiently crystalised to allow pros to evaluate the position accurately (to within a point or 2) just by counting the territories.
I think this way of thinking may be more applicable to the endgame.
Earlier in the game, I think one would be working more with comparisons when evaluating development moves, like “my move here is just as good as his move there, or maybe x points better/worse”.
As for urgent/fighting moves, it’s harder to evaluate those in term of points. It’s more a case of “just play urgent moves, because it’s bad not to” (just as you shouldn’t hang your queen in chess, don’t bother to evaluate how bad it is exactly).
In a high level game, I think it’s usually not really a matter of "did this move work as intended or not?”. The “working sequence” shouldn’t appear on the board, just as a ladder shouldn’t appear on the board. If it does, one player made a big mistake. You typically only see a “working sequence” in a diagram offered by a commentator to show what was under the surface.
When comparing a game of go to a boxing match, strong players dance around each other all the time, rarely leaving an opening for their opponent to land a good punch. So a high level game of go without a good commentator may be a bit boring for regular spectators. A lower level game of go is probably much more spectacular.