The reason for that is the same reason why TFA advocates for skippable tutorials: the average gamer today has less time on their hands than 20 or 30 years ago. When I was a child, I would only be able to get a new game every 4-6 months, and I would have hundreds of hours to pour into each game over the course of those months, so I didn't mind having to spend quite a while to get into it. Nowadays, my play sessions are more like 2-3 hours twice a week or so, because adult life includes a lot more obligations than my teenage life back then. Given that I have less time to devote to this hobby, I have a higher desire to make every minute and every hour count.

That's not to say that I don't like a game that rewards me for figuring stuff out. But it should be actually significant stuff like a puzzle solution or how a certain place relates to a certain event in the world's history, not stuff like "I just died 10 times because I was pressing A when instead I should have been pressing RL+B which the game never told me was a thing I could do".

The other extreme of this would be something like NetHack, where it's very difficult to figure things out on your own even if you read the guidebook through and through. There is no tutorial.

(You might discover the one mention of Elbereth in the guide, but I think it would be very difficult to make progress without consulting the larger NetHack wiki.)