People have hunted just fine for thousands of years without digital trail cameras, I think I can manage to do the same.
They hunted without guns, too, and before that without bows and arrows, LOL.
Like any other technology, if you buy garbage, you have to expect poor results. Not all are quality cameras, even by name brands, and so you have to shop wisely. You also have to use the technology wisely or you fail to use it to its capabilities.