If you think it's a natural occurrence, why do most people still dont take good use of the opportunity when it comes again to them?

You may be right but I dont agree with you. Every man or woman can actually feel regrets because they mixed a good opportunity, the same person is expected to grab the opportunity if another chance is giving, but few people wont, the question is why? It simply shows that we humans are very good at procrastinating a lot, only few people are willing to take bold steps.