Sacrifices

In class we have discussed about the sacrifices Hindu priests make to the Gods in order to please them and get fortune and good things happen to them in return. We've also talked about how if bad weather were to happen after praying for good weather, for example, then the reason would solely be that the sacrifice was done improperly. But I have a question; what would happen if some priest apparently did the sacrifice wrong but then went throught the process of making sure it was right, but then bad weather insued again?(This is for all things not just weather) Would they keep making sacrifices until good fortune occured? To me, this seems inpractical because realistically, as human beings, we are able to change our own fate, fortune or future by our own will alone. I don't think relying on pleasing a god by doing sacrifices really helped someone consistently. You could most likely prove this by pitting someone against someone else in a boxing ring. One person makes a sacrifice to their god before the match while teh other one has been practicing way more and has more talent. I think naturally the more talented one will win the boxing match. Afterwards though, the person who made the sacrifice will go back and think to themself: "Maybe I didn't do the sacrifice right, I'll have to do it again". Then again he gets beaten over and over again. Most people would just kind of have to question the credibilitiy of doing this ritual wouldn't they? Maybe this is one of the few reasons why this ritual is pretty much outdated with the exception of a few devout priests who still practice it today.