But the point was exactly not to be making these decisions consciously every time you write code. The point - in agreement with you - was that these decisions are not necessarily important.
The argument is that these decisions are made, whether you are aware of them or not, and in this case Beck was undertaking to understand them in nit-picking detail so they can be made visible and better understood, rather than remaining implicit, ill-understood, and possibly sub-optimal.
The author wasn't advocating that this sort of thing be done of every line of code - that would be ludicrous in the extreme. Don't attack the extreme strawman, try to understand and appreciate the underlying purpose.
In my 35 years of software work, far, far too often I see people concentrating on the pointless - bike-shedding if you will - and sadly, this is another case. Concentrate on the point that matters - understanding the processes and decisions of coding, and not the details of the specific instance.