The important thing to decipher as a parent is knowing whether or not your child is crying vs. crying via a tantrum. Right around 1 year old is when they're considered toddlers, and it's also when throwing tantrums begin. Anything under the age of 1 is usually not a tantrum and it's them trying to communicate to you that something is wrong. Ignoring their crying (less than 1 yr old) because you think they're wired to gain control of you is just bs. A toddler, yes, I agree.. not a baby though.
A lot of the tantrums that toddlers throw are totally predicatable. If a toddler doesn't get enough sleep or sleeps at the wrong times, he's going to feel grumpy and act that way. A huge number of toddlers and preschoolers aren't sleeping enough. If parents would put babies to bed around 7 or 8 and let them sleep the eleven or twelve hours they need, the kid would be better for it. That's in addition to the nap after lunch, of course.