big jake wroteNot really a big deal.
And, it's also "not really a big deal" to wear all black shoes, if that's what's expected of you in "Rome". I've been officiating for over thirty years, in an association that wants us to wear all back shoes. Finding all back shoes has never been a problem for me. Early in my career I had to "paint over" a small white "Spot Bilt" logo on the back of my shoes. Still "not really a big deal".
For some people it might be difficult to get a block charge, travel, or out of bounds, correct all the time. For others it might be difficult maintain proper game management all the time. It should be real easy to wear all black shoes, if your are requested to do so, all the time.