I absolutely understand what you're getting at. But, I have a reason to disagree. I find cookbooks help expand the cultural horizons to cooking. Only because you can get "authentic" cookbooks of other countries. The Polish ones I have, are in Polish. So, that's easy. The French ones I have, though in English, are written either originally by Frenchies and translated or they also know English and have a good editor. Same goes for Japanese, Thai and German. But I also look for keywords about their grandmother. Best way to know the authentic level of a cookbook in English is how much they admit they're stealing from their grandma. The higher, the better. Especially if they talk about struggling to get the right ingredients.
Honestly, I miss absolutely nothing from the internet when it comes to cooking. But I also wanted to be a chef. So I studied how to properly cook long ago and I cook almost every day... so I'll admit in already an outlier. Still, the way the internet treats cooking is retarded. It doesn't surprise me that people don't like to cook if they grew up with the internet as a learning resource. All these people overcomplicate easy recipes and substitute anything because it makes them feel like pretty snowflakes.