If you want to believe that belief in external reality to your senses requires a similar leap of faith that belief in unprovably extant supreme beings requires that’s fine, but that’s not what the word atheist means. That’s not how people use it. They don’t use it to refer to people who refuse to believe in things requiring faith (as in believing in something that can’t be proven). It is used to refer to people who don’t believe in gods.
If you want to believe that belief in external reality to your senses requires a similar leap of faith that belief in unprovably extant supreme beings requires that’s fine, but that’s not what the word atheist means. That’s not how people use it. They don’t use it to refer to people who refuse to believe in things requiring faith (as in believing in something that can’t be proven). It is used to refer to people who don’t believe in gods.
Reality is god to realists. That’s what they believe in. They worship it, they obey it, they demand others have the same respect for it. It’s theism.