Correct me if I'm wrong but gambling do have a lot of meanings, though what you have said is all true, however, that is different gambling compare to the gambling where money is involve. Let me name those two so you guys could differ one another, what OP said is the gambling that I called "gambling in life", in life, literally, like survival of the fittest, and it is reasonable, most of the time it is good for you, even if you lose you gain the most valuable lesson to be better on what you are going to do next.

The other one is gambling for "life" (pun intended), which we are risking our money, time, and energy in something that don't benefit us at all of the times, because honestly, a lot of people are insisting that they could make money through gambling but they just can't. They shut their mindset down where gambling is a way of earning money in everyday lives, which is so ironic for most of the people.