> Sometimes versions of the game are also intentionally shipped with debug symbols to generate better error reports. However, sometimes programmers forget to remove the debug symbols from the final binaries of the game. Programmers are humans, and humans make mistakes.
It looks like the author is saying shipping final binaries with debug symbols is a mistake, and that's what @ho_schi is criticising.
The author is noting that in this particular case, Valve made a mistake in releasing the debug symbols for a particular build, as noted by them releasing them in a 2017 build, and then removing them in a subsequent build.
The author did not say that "shipping with debug symbols is always a mistake", they noted that it can happen unintentionally and provided evidence of that in this case.
> Sometimes versions of the game are also intentionally shipped with debug symbols to generate better error reports. However, sometimes programmers forget to remove the debug symbols from the final binaries of the game. Programmers are humans, and humans make mistakes.
It looks like the author is saying shipping final binaries with debug symbols is a mistake, and that's what @ho_schi is criticising.