In many countries and cultures people go into their homes in their shoes. It is very comfortable but it has many disadvantages as you bring many undesired objects to your home. We will not say you that you should wear out your shoes but using an outdoor rug would minimise the risk.
Think that it is rainy outside, and as a quick cleaner, you have just outdoor rugs. It is a healthy and aesthetic way to use them. Yes, not only healthy, but also aesthetic because there are used not only for that function. They can be used under tables or on balconies. They make outdoor use much easier and desirable.
Outdoor life is another healthy aspect, especially if you have some green around. To find the comfort of your home and keep the boring sides of it, you will spend much more interesting time outside. But without an outdoor carpet, it would not be so easy. For colder days, there even some rugs with heater. If you have a garden, there is no reason to stay inside.
Out door rugs are generally very cheap and anybody can get them. So make use of it!