Plan ahead for better footing. Awareness of your environment and where you place yourself is crucial for personal protection. Within your environment, maneuvering terrain should always be a consideration to maximize your mobility. That said, a detail often taken for granted for personal protection is footwear. For women, high heels are highly insufficient for any sort of mobility, let alone support and traction. Additionally, men's dress shoes present a traction issue as well.
There are varying degrees of footwear performance relevant to your everyday environment. Those that are serious about protection consider it just as important as where their next meal comes from. And I would concur. Planning your day ahead of time down to the last relevant detail helps with survival percentages.
I always prefer to wear something with enough traction to maneuver without slipping on corporate tile floors, dusty polished wood floors, wet sidewalks, etc. If the context allows for it, a trail shoe/boot becomes my everyday footwear.
Even if you're not a military operator, law enforcement or tactical professional, it's still important to wear functional footwear despite how modern workplace trends and requirements may influence your situation and environment. For instance, wearing an outdoor-style boot (whether mid-height or 8" stack) with a aggressive tread will give ensure a greater percentage of footing and readiness should a situation call for it. If you don't work in an outdoor culture type of company where outdoor footwear is the norm, all is not lost. There are quasi-dress shoes and boots that offer better traction than others. Keep in mind, however, that there is no substitute for planning and preparing (and training) for protection.
Semi-dress shoes, athletic shoes, or boots? Boots are better for protection from weather, animals/reptiles/insects, terrain/environmental, protects the surrounding ankle and shin area from scrapes/cuts, impacts, and certain strikes in some cases, especially with an 8" stack. The bottomline is that boots are superior to shoes for protection. That's one of the reasons why tactical operators wear them for certain training and operations. Moreover, if you're serious about the outdoors, then boots are the most versatile and superior option as well.
Blending in. If your everyday may call for you to blend into society or the workplace, a "low-profile" or covert style of footwear can be just as important as a use obviously intended for outdoor recreation or tactical training. Not everyone has the option of looking tactical (and not everyone should). For many public or social aspects, it's important not to look like you just jumped out of the latest tactical magazine. So, it's helpful to dress more covertly to blend in to ensure your appearance doesn't create unwanted attention – especially being seen and targeted by the bad guys.
If you work in a corporate setting, you may have to accommodate how you dress to fit the requirements of the workplace dress code and for social respect. So, it'll be worth the time to find footwear that doubles as a functional dress shoe/boot with protective and high-performance characteristics. It's also worth to spend the time and energy (and many times the money) preparing yourself by having additional performance-based footwear for weather and terrain packed in your car or office ready for use at a moments notice.