So many people say that. And while there may be some truth in it, its equally true for most people that enjoying life is usually too expensive. A hundred years back, may be, it was easy, and cheap, to get amused. a walk along the river, or in the park, evenings spent with family, a friendly round of the sport of choice... people could afford these...
But now, all of these are expensive or difficult or both...
A walk along the river... you may end up with a slipped disc from a fall or even fall prey to criminals or policemen.
A stroll in the park... most parks are locked up for good, or have been encroached upon.
Family time is becoming non-existent due to hectic work and travel schedules, and the omni-potent presence of the idiot box means that whatever little time the family spends together is only a physical presence
Sports are costly today - check out the paraphernalia of equipment required, and the quite often ensuing medical care
The two most important reasons why relaxation is no longer relaxing is the utterly commercial nature of our society today, and the huge population that the countries meager resources have to support. And of course, there is a strong chance that these two aspects feed of each other (no-other-entertainment and more-hands-to-earn theories of population increase, and the well known economic laws of demand-supply affecting price)
Someone said that life is not about happiness. It is about overcoming a series of challenges in a "Pursuit of Happyness." Some enjoy this pursuit, others get frustrated. Happiness is not measured by the size of your car, the plushness of your house, or the number of stamps on your passport. Some would say that the more material pleasures you have, the more unlikely it is that you will be happy.
The essence is to do something which brings a smile to anothers face. Knowing that someone cares for you makes you fulfilled. Knowing that you are the fulfillment of someone's life, makes you happy.