I was reading a book about physics and it states the following:

"What we consider to be a planet with its own gravitational field
moving around the sun in an orbit created by the gravitational
attraction of the sun, is actually a pronounced curvature of the
space-time continuum finding its easiest path through the continuum in
the vicinity of a more pronounced curvature of the continuum."

My question: is this correct? It sounds wrong to me. I thought that
the space-time continuum is only slightly curved near the sun, and
that this only slightly affects the orbit of the planets. The basic
classical physics/Newton's law of gravity approximates the orbits of
the planets and the effects of the curved space-time continuum is a
small correction, right? This explains why Mercury's perihelion moves
slightly, right?