Most of us are appalled by shows like Hoarders. People pile up household items, even useless things, until they can barely move in their home. Mice and other undesirables move in. Some people even spend money purchasing more stuff they don't need to further wall themselves into their homes.
We now know that psychological issues are at the root of hoarding. All the detritus forms a shield against grief, depression, bad feelings, unhappy memories. A frozen state of immobility ensues. Getting rid of anything allows pain to get in.
Clutter is a milder form of hoarding and brings its own set of negative feelings. We can feel uneasy, even stressed, looking around at multitude of unfinished projects, things we own. Large, almost empty spaces, by contrast, are more restful. There are fewer things to focus on and what's there seems more important. Think of art galleries and museums. They are restful, calming places. No doubt the gallery or museum has a place where supplies, stationery, staff lunches, restoration and display tools reside but it is out of sight.
A toaster may be used once a day, or not even that yet often it sits on a kitchen counter, removing space that could be empty. The same can be said of the blender that makes smoothies from time to time or the pan that sautés. Do you need to look at them every time you glance at the kitchen? You might have noticed that homes that are staged for an Open House are remarkably uncluttered.
Try an experiment. Clear every surface in a designated room, placing everything in an out of sight box. Nothing on counters, tables or shelves. Now place one decorative item that has some significance to you on one table. A vase you purchased in that little village in Greece on that long ago vacation. Place a piece of greenery from your garden on it. Maybe one more item or several books on a shelf. That's it.
Sit back and feel the calm envelop you. Go out for a few hours and then come back. It's pleasant now, isn't it, to not feel stressed at the mess of undone tasks. Your home is truly a haven.