That's a good point, I'd be willing to bet that while some people will like reading a book that opens with a good opening hook, there will be others who dislike or even HATE that, and others that might notice it and be indifferent. And probably a fair few that for whatever reason, never even notice it's there.
Still, if it does work, it works, it just depends after that how well it keeps someones interest.
To state the obvious - you'll never do something everyone likes. It's not a feasible goal. It's how many people you get to like it.
If you can find 30,000 people who buy all your books, you'll have a fine writing career. 30,000 is, when you come down to it, not a lot of people. Providing you can find them to sell to them, the list of feasible approaches that can make 30,000 people happy is really big.
The main practicality problem is that reaching these people without trad publishing is hard, and loftier goals even harder - and trad publishing has a series of gates garrisoned with people who are mostly only interested in the stories they think have the potential to sell much more than that (even if they regularly don't). And the trend right now is for books that go for the jugular right away with their hooks.
Which does kind of suck if you'd like to keep up with contemporary publishing but don't like that. Note how Skip's list of favourite authors is the authors of yesteryear. Most of mine are too, and none of the recent ones are big fishes. Note Toby's advice. It's generally spot on, but I'd quibble about making the opening situation life-threatening because even while I think it's good advice for today's market, I've lost count of the number of books where I open it up for a look, find a dreary action scene, and shut it. Not, I hasten to add, that life-threatening = action all the time. Plenty of ways to skin that cat. But it does for many.
In any case, there we go. Learn the "rules", and then decide when to break them. You want to write a book that has a fairly slow opening with minor tension, that establishes a scene and has little if any change going on? Pratchett, as mentioned, could start with world building info because he was funny while he did it. Hossain, whose recent
Gurkha and Lord of Tuesday I adore, starts with a character waking up - change, but little hook - and I think it works because he's an ancient djinn, and he's out to do some ancient djinn sh*t, and the first person he meets is this human who explains how much people have changed. Wecker's
Golem and the Djinni starts quite slow but not only does it have great voice, it offers a really intriguing window of change - a man asking for a golem wife. Because you know that will end poorly!
And so on and so on.
I think the one fairly immutable law is you must show a change - or at least an impending change - that will lead to an interesting scenario. Even if you go back to the slowest, most scene-setting epic fantasy, you see it fairly quick. Pug in Feist's
Magician has to find shelter from a storm and in doing so reveals he may have magical powers. Bilbo's birthday will mean change in
Lord of the Rings. Rand sees the rider in black real quick in
Wheel of Time. Allanon shows real quick in
Sword of Shannara. About the only one of those stories that doesn't do this is Eddings' Belgariad, where it a) opens with an info-dump prologue b) then gives us a summary of Garion's homey childhood. But even then, Eddings uses bits in it to say "greater things await him", which is also on the blurb and the title, and it is very homey and appealing, so Eddings uses our knowledge of the genre/book and our desire to see nice cozy idyllic scenes to cheat. But not many can.