Yeah id say it's absolutely essential if anyone wants a nice balanced and calm household. People just need to realise there is no neglect involved. A warm house with caring parents certainly isn't neglectful. No one is being mean by establishing a routine.
Get past the first few nights and you never look back.
Ours has slept 10-12hrs a night, every night since she was 6m old. It allows adults to have the evening to decompress and it gives the child the best opportunity to recharge and develop.
Yeah, its a weird idea that babies waking up a lot in the night, screaming and not getting as much sleep is better than a week or so of them having to scream for 20 minutes total before settling. We have had plenty of evening where one of them takes a good 2.5 hours to finally properly go to sleep so its not cruel to make them cry for a bit to ultimately help them get into a happier and healthier routine.
Thats ignoring the effect on the parents of **** sleep for months.