It's a combination of not wanting to slow down the game more and also treading carefully when expanding VAR scope.

The logic comes down to a deliberate choice made by IFAB when framing the rules. VAR was explicitly limited to four high-stakes categories: Goals, Penalties, Direct Red Cards, and cases of Mistaken Identity. Set-piece restarts—corners, goal kicks, throw-ins—were intentionally left out.

But this creates as you said a fascinating paradox when a wrong corner leads to a goal. If a team scores from a corner that should have been a goal kick…. But if you review the corner, you must logically review the throw-in 30 seconds before it. Opening that door creates an infinite regressive loop of micro-analyses. By the way argentina Egypt game was an example of such “when do you stop the review “

Modern soccer chose to accept small, tolerable errors to save continuous play—the boundary isn't a flaw in the technology, it's the price of keeping the game mocking

Let me add I’m not a big VAR fan despite
1) my childhood carrying the scar of Seville ’82, France Germany semi final watching Battiston motionless while Schumacher walked away unpunished and an entire generation of fans was left crushed by raw injustice
2) France second World Cup being positively impacted by var review on a Croatia hands that lead to the 2-1 penalty
3) rugby (my sport ) being very positively impacted by VAR

We have created a system where a toe or a shoulder 1cm past is offside and removes a goal, and yet we willingly encourage players to fall down for little reason in order to get the referee to whistle a foul. My least favorite is when they fall down and grab the ball forcing a whistle. That should be an automatic caution for deliberate handball.

Applauding the technology for getting the VAR calls correct fails to see the forest for the trees. I want players to stop acting like wankers. That 1cm toe or a ball touching my hair is not being a wanker. Deliberately falling down to influence the referee is being a wanker.

I will note in the great Messi / Ronaldo debate, that Messi is one of the few players who stays on his feet through contact when he knows he can score anyway. It is his most admirable trait. I don't understand why more soccer players don't feel obliged to approach this standard of behavior. That is why rugby players will forever call soccer players soft. They willing choose to be soft because the state of the laws and refereeing encourages soft behavior.

I agree that rugby has the best implementation of VAR of any sport. It appears that NRL (Australian Rugby League) and the NFL are starting to adopt some of the same standards (the hip drop tackle being the most recent). I encourage soccer to coordinate with League and Union and see what they have learned.

the player who loses control of the ball in the penalty area and does the self trip

at times when it comes to reviewing plays. Some things they see in replay, they can act on, but other times, they can't.