Yes to the issue of making it more difficult than it needs to be (and you then end up with two conflicting demands on the mother - feed on demand, but make each bottle as and when it is needed, including the 30 minute kettle cooling time! The thing about the "don't make them up in advance" advice is it totally fails to do a risk analysis of what options people will resort to in the real world.
The dangerous thing in this whole process is the formula powder - it is not sterile. So it needs to be made up with hot water. But a lot of people still think the danger lies in the water. So you get people thinking "well I can't make a batch of bottles once a day and keep them in the fridge because I've been told that's not safe, so I'll keep 6 bottles of boiled water in the fridge and mix the powder with the (cold) water as and when I need it." The latter practice is actually more dangerous than making 6 bottles, flash-cooling them by running them under the cold tap and putting them straight in the fridge.
In other words:
(A) Optimal - mind-read your baby, put the kettle on 30 minutes before they will cry, make the formula up with precisely 70 degree water, cool it under the tap and give to the baby just as he/she starts to cry.
(B) Sub-optimal but fairly low risk. Make a batch of 6 bottles with water at the correct temperature and shove them in the fridge.
(C) Potentially dangerous - mix unsterile powder with cold water and give to your baby.
In order to prevent people doing B, health professionals are pushing A as the only solution, not taking into account that if people are told not to do B what most of them will do is in fact C.
I spent a fucking fortune on ready-made UHT formula to sidestep the problem, but not everyone is in the fortunate position of having well-paid maternity cover.