In the age of infinite aliexpress slop, brand is the fastest way to assess quality. There's a difference between branding on a toilet vs branding on clothing. No one is flexing their wealth with a toilet brand. The brand exists so someone in the market to buy a toilet notices the brand on lots of other toilets they see around which gives it more trust over a no name direct from China toilet.

To me, a product with no visible brand at all feels like a drive by operation that shouldn't be taken seriously. You can see this all over, nice cutlery will always have a brand stamped in the metal, while cheap junky stuff will be unbranded since it's sold on price rather than quality and trust.