I concur: SPACE is not curved, or to abridge, SPACE is not. Space mut be that singularly HUMAN invention to symbolize "that medium which contains ie possesses Gravity", as if every dang thing in our world needed something 'greater' to serve as its 'vessel'. No; gravity pervades the cosmos but it doesn't need a well-defined perfectly structured (3D) yet totally imaginary VESSEL in which it 'dwells'. Gravity stands on its own.

Since space is non-existant, then it is neither uniform nor 'curved' (whatever that means). What is indisputable is only that gravity is not uniform.