HH only suggested that the late Mr Sharif saw gambling as the most important thing in his life, without a scrap of evidence.
As far as I'm aware he loved playing contract bridge and loved a go on the wheel, as do I in the latter case when I've been able. Good on him - he enjoyed it and didn't ruin himself or anybody else as far as I'm aware.
Why are some people such tight arses about the pleasures of other people that don't impinge upon them in any way and which they don't share? What is wrong with some people? Don't have an abortion because I don't like it. Don't marry the (same-sexed) love of your life because I don't like it. Don't die an easy, peaceful, painless, dignified death because I don't think you should. Don't read this book or see that opera or watch that play because I don't think you should. I am offended, and that makes me right.
What a bunch of bastards some people are, and nothing has made it as easy to be such as religion. Jane Austen said that half the world can't understand the pleasures of the other half. That's OK; don't try to understand, as you won't; just let people get on and do their thing. They won't bother you; don't bother them.
You will find this process far easier if you're not religious, and especialy if you're not a monotheist.