Wrong. My baby when he was little had a milk allergy which just one of the symptoms is colic, which is hell on earth alone. It didn't matter what i did, how much comfort i gave, calm music, songs, stories, lots of winding, feeding more, feeding less, lots of attempts with meds like anti colic stuff, stuff for tummy acid, all the usual baby meds for wind and unease etc. Nothing worked. I had a breakdown in the end and he was finally diagnosed (noone listened to me until it got to severe mental health concerns) was given milk for cmpa, and the issue went away gradually. Prior to that it was weeks of noone listening to me, telling me colic was normal, this would pass and so on. No matter how many professionals i begged (literally) and told that it wasn't normal.
If you would have lived under me, you would have heard my baby screaming for hours. What you wouldnt have heard because it's quiet, was the love, cuddles, singing, bicycle legs and other wind removing attempts, stories, meds I tried, the list goes on.
Im not saying these parents arent being neglectful or that this is normal. Just that your assumptions that they are doing cry it out, or ignoring their baby, are neglectful, and the other hyperbolic comments you made are the extreme end, one end of possibilities. There are other possibilities. Like mine. Its not nice to assume the worst from people. I was so poorly by the end that I was sectioned and my baby taken because i couldn't take it anymore, there was nothing left to try. Cue the next year of court, a mother and baby unit for parental assessment, which in their words i passed with flying colours, and finally getting my baby back home with lots of the support i had initially begged for.
Its not good to assume the worst