How do asteroids work in terms of defining where large scale battles take place?

Like, how do you want them set up for your first engagement in 1v1?

When engaging, do you want to be coming from within the asteroids, k-turning into clear space, with the enemy coming at you with no cover attempting to k-turn into the asteroids?

In epic games, does the range 1 displacement of the asteroids allow them to discourage a large enemy force from coming through them?

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I was thinking of using my asteroids to segment off my enemy L from their C and R, and focus it down. Does that work or will my opponent simply go through the asteroids and engage us?