[pseudonym]

It comes down, for me, to more a question of "how much external facetime do you have in your day-to-day job". Shared cultural displays are one thing, but forcing everyone into the "Least Comfortable Denominator" just because some subset of your culture does need to display that level of formality...

Even above the comfortable clothing aspect of it, inflexibility in a comparatively minor thing like "dress code in non-customer-facing positions" indicates potential inflexibility in far more important things (sick/maternity/bereavement time, butt-in-chair time, informal 1-on-1s with higher-ups, merit-based raises, etc) and would greatly negatively influence the likelihood of taking a job for me.