These facts, except for the one about alcohol, can be summarized as "We can't control our environment as much as we thought." Being able to strongly control our environment using methods that seem obvious and reasonable would be nice, so it would be nice if these facts were false.
Another possibility is that pleasure is a better guide than the people who want to give advice tend to believe.
The common advice isn't always anti-pleasure (get enough sleep!), but a lot of it is. The get enough sleep part might be better directed to employers-- give your employees a chance to get enough sleep!
Information that surprises you is interesting as it exposes where you have been miscalibrated, and allows you to correct for that.
I suspect the users of LessWrong have fairly similar beliefs, so it is probable that information that has surprised you would surprise others here, so it would be useful for them if you shared them.
Example: In a discussion with a friend recently I realised I had massively miscalibrated on the percentage of the UK population who shared my beliefs on certain subjects, in general the population was far more conservative than I had expected.
In retrospect I was assuming my own personal experience was more representative than it was, even when attempting to correct for that.