I believe the missing question is: what is the rationale beyond this decision of putting the /dev/pts out of fstab? Besides the aforementioned robustness (which at some point I tend to agree), what else would be the technically benefits? If for nothing else than "stopping the user to shoot his foot", I believe this should not be done, as I need to agree that it hurts Arch Way. Also as pointed before, it may create problems with chroot (if I understood correctly).

Just my (user standpoint) 2 cents.
 

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Cheers,
      Rodrigo

A computer is like air conditioning: it becomes useless when you open windows.
                   ~Linus Torvalds