I wouldn’t agree with that as a blanket statement, definitely in their case their was a lack of routine with so much travelling but my kids had a fairly good routine, the odd day was off but in general it was good, in fairness sleeping was never an issue for us but the eating was all them, great up till 2 and got fussy then, we tried everything, especially on the first and it was so stressful, many days she was crying and so was I so whether it was right or wrong we gave up and gave them what they like, they are older now and still fussy but eat a lot of what they like so they are not hungry