Recently I've been looking at some 1970s pro games and seeing the same thing! A few times I've looked at a tenuki and thought: surely black needs to make a second eye for that big dragon? And black having played away, why does white answer? So I ask KataGo -- what happens if white tries to kill the dragon? In most cases so far, the result seems to be that some white stones somewhere get cut off, and it turns into a giant one-eye-each seki. My conclusion: you only need the second eye once the other player is thick enough on the outside to actually kill. Defending before that time means that you've just given up sente unnecessarily. I think this is something that amateurs can learn from.

Maybe a tangent but analyzing with the computer is sometime similar to joseki books and YouTube videos. It makes you feel really powerful. You experience how you can think through all the variations in a flash just moments after watching or browsing through the variations. But try and explain what you have learned to someone else or even something easier like using it in a game. You just won't be able to do it well (with maybe one exception).

Maybe there are two main reasons:
* You only observed (watched, read or followed the blue dot), you didn't think through the positions until you could find the moves on your own.
* You didn't spend enough time on the subject to really learn it.

The only exception, that I can think of, is if what you are learning is almost in reach. If it is something that you have almost mastered, something that you really do understand, and it is emerging as a new skill, then you might experience that the straw is breaking the camel's back. We have probably all had moments like that. The first time we were able to read or the first time you could understand a foreign language. Sometimes such things feel instantaneous and have a big impact on our psyche. Of course, even if it can feel like it does, learning is not something that happens instantaneously.

Maybe these considerations are part of the reason why the usual mantra about getting stronger seems to be to do life and death problems. Playing games with longer time controls, also, and playing stronger opponents. It is things that you (mostly) can't do, with positive results, without thinking through the moves on your own.