There's clutter, clutter and clutter.
Uncontrolled hoarding where there's no tidying, rubbish disposal and nothing is accessible for cleaning become health hazards with accumulating grime and potential to host pests.
Having corners/ edges/ less used rooms where the main living spaces are cleared and maintained, but less used spaces cleaned more intermittently are rarely a health issue. A bit of dust is generally of no harm.
I like stuff. I like ornaments, books, sports equipment, a wardrobe full of clothes etc; there are minimalists that would call it clutter. I might have to move things to clean/ dust sometimes, but while my house is no minimalist show home, it is a happy, healthy place to live. Many neurodiverse people need their possessions visible as a prompt to compensate for poor working memory so "clutter" can be practical (clear desk policies in workplaces can be ablist and detrimental to productive work)
Very minimalist, ultra clean homes are not necessarily healthy places to live in. Our immune systems need to be stimulated by "dirt" and benign environmental microbes in order to work effectively. Excessive cleaning products and air fresheners can be bad for our airways and skin. Mixing cleaning products can be dangerous. Excessive cleaning can be wasteful of resources, energy and polluting. Obsessive cleaning can be a symptom of poor mental health as much as a compulsive hoard.
The range of normal, healthy levels of housekeeping is broad and neither extreme is desirable.