How can Apple get away with this
Allow me to suggest you reconsider who is remiss by providing a bit of history. The better question is, "How can Seiko get away with this?"
Apple hardware went to 64-bit processors in 2006--13 years ago. Software developers, including whoever does Seiko's Label maker drivers and software, knew this.Competent software developers made the changes needed.
Other chose to ignore the march of progress even thought they had the option to receive Apple development plans and documentation through Apple's well-recognized Developers Connection. Apple holds conferences on this stuff, but they cannot make a lazy developer pay attention to it.
You can lead a horse to water but you can't make him write 64-bit code.