Yes, you are 100% correct, there are all kinds of conflicting information out there and the answer for everything a parrot does which we consider unacceptable behavior (most of what they do it is - to us, that is, it's perfectly acceptable and normal to them 
) is, ultimately, 'Deal with it' (and that's why there are SOOOOOO many parrots given up every day, because people 'deal with it' for a couple of years and then cannot take it any more). But, in all honesty, I am one of the very few people who believes that paying attention to a screaming bird is the right thing to do - most people will tell you to ignore the screams until the bird learns to shut up -problem is, this smacks me as terribly cruel to the poor bird and, worst of all, not all of them learn to shut up! Some never stop screaming (I took in a cockatoo that did it for 21 years!)Parrot are loud, demanding, messy, destructive, expensive/high maintenance, labor-intensive and time-consuming. It's the way they are and, although some of them are a bit better than others, there is very little one can do to change this but to redirect what we can and learn to live with what we can't.
Now, babies are more demanding than adults, same as in humans. A baby does require much more time and attention than an adult -that's a given! But a happy, healthy, well-adjusted baby will grow up to become an adult that will not have excessive 'unacceptable' behaviors - and that, I think, should be your goal.
For one thing, you should have a strict routine so he can get used to been alone at certain times -babies are always quiet after the parents feed them, even if the parents are not in the nest; and they rest/nap for a couple of hours at noon so it's like when you have a human baby and you re-arrange your entire daily routine to fit the baby's schedule and end up doing your stuff -showering, cooking, etc- when the baby is napping so try cooking your dinner after the baby goes to sleep (it's fairly easy now because it's dark enough to cover them by 7:30 pm -I turn off their overhead light at 5pm this time of the year so, by 7:30, they are ready to go to sleep).
Now, one important question here that has a very direct effect on a baby's screaming is: do you work outside the house? Because if baby is left alone for hours at a time every day, he will be more demanding of you when you are home than if you are there for him all day long. Been alone is VERY traumatic for them and some adjust while others don't and that's why you can't go out for hours and hours when you have a baby bird (or a puppy or a kitten or any other baby, regardless of the species). So, if you do work outside the house, the solution would be day care or finding somebody (relative, friend, neighbor, etc) that will come for 2 hours every day to keep baby company. But, if you don't, it's just a matter of allowing him to ride your shoulder while you do your stuff. I can do pretty much anything with a parrot on my shoulder (unless it's a real big one because they unbalance me when I bend forward), sweep, mop, do laundry, dust, emails, make the bed, clean the cat litter boxes, put makeup on, get dressed (they perch on the edge of a basket I have on a shelf in the dressing room), take a shower ((they perch on the towel bar next to the tub), etc. I can even cook as long as it's things like washing produce, chopping, mixing, etc, I don't cook anything on top of the stove with one of them on my shoulder but I can make things in the microwave and in the oven without a problem. My neighbors and friends are so used to always seeing me with a parrot on my shoulder that, when they don't, they ask about it
Parrots are not easy pets. People think a bird is low maintenance but that cannot be farther from the truth when it comes to parrots! I would much rather have a pack of dogs than a single parrot! Sheesh! I used to care for 26 cats and it was easier than having a single parrot!
