Most of us gambling have the strong conviction that no bet is a waste because we are always gambling under a cause and this is done because we are more sure of what we are doing, if we can tell about the previous gambling experience and what we have drawn out of them, how we can relate to the present time and get more closeness to accurate gambling expectations, then we can believe along that no bet is a waste from us as long as we have something to take or learn from it.
"No bet is a waste" I believe is a statement that is absolutely irrelevant as long as gambling is concerned. I have shared my point of view on this topic several times, and maybe I initially supported this, but my stand have changed after giving this topic a deeper thought.
I can tell you that the majority of us have nothing to learn from our previous bets, it is important we understand that gambling is not the same as trading where mistakes are possible, and traders can learn from the mistakes they made with previous trades.
Gambling is completely different, mistakes are very minimal with bets, almost non-existent, and what this mean is that, when we bet and loose the bet, it is simply what it is, a lost and that's it, it may be a waste of time to start looking for a possible mistake in the bet to correct next time.
When that next time comes, and you decided to bet the other way as a way of correcting what you assumed to be a mistake from the previous lost bet, you still may loose the bet, which means that no mistake was made in the previous bet.
Winning in bets is luck, and this is all I can say.