For me, laziness and the lack of self-belief are the main reasons why people would be turning to gambling predictions from external sources, especially with sports betting. But I can still pardon those who are willing to gamble but do not have the time to do the forecast due to important reasons, they can turn to experts to benefit easily from them but they must ensure that they did thorough research before they entrust their money with any expert's prediction, especially the one's that are premium.
Well I will also like to inform you that it's not just laziness all the time while that can also contribute anyways. You will still need to look at the fact that it's not everyone that can actually predict matches on their own without external sources and can't say those people are also lazy per say because it's not their fault that they cannot predict on their own. Such people oftentimes need ideas from external sources to be able to predict with accuracy.
Gambling is easy to learn and the information needed is always readily available on the internet if we want it. We just need to be reasonable with the interpretations and we will be winning often without stressing ourselves with external sources that will make us dependent on them.
I don't know on the bases of your own perspective about gambling but I can say that gambling is not easy. At least not as easy as you may make it sound. You will need to do extra work to be able to gamble accurately and profitably. When you gambling, you also hVe to consider the aspect that gambling is a game of chances and also require a lot of calculative efforts of probability.