Too often we expect our kids to be happy about what we need them to do instead of allowing them to experience their emotions as they need to.
The premise behind extinction sleep training is that infants (and toddlers) are being taught to "self-soothe"; however, this ignores key points of what self-soothing abilities can be expected from children and how distressed they are at the time of separation. Instead of focusing on these extinction methods, gentler methods that respect where the child is developmentally should be considered.
I feel like sleep trainers are like a mythical monster where every time you cut off one head with science and reason, two more take their place that are even more dangerous than before. In the last few months alone, the media has highlighted this method of locking your child in a room for 12 hours a day under the guise of “helping” your child and a method of sleep training newborns by not feeding them at night.