Update article.md

Author: iliakan

1-js/04-object-basics/07-optional-chaining/article.md

@@ -103,9 +103,7 @@ alert( user?.address.street ); // undefined
 
 Please note: the `?.` syntax makes optional the value before it, but not any further.
 
-In the example above, `user?.address.street` allows only `user` to be `null/undefined`.
-
-On the other hand, if `user` does exist, then it must have `user.address` property, otherwise `user?.address.street` gives an error at the second dot.
+In the example above, `user?.address.street` allows `user` to be `null/undefined`, but `user` does exist, then further access uses a plain dot `.`, so it must have `user.address` property, otherwise `user?.address.street` gives an error at the second dot.
 
 ```warn header="Don't overuse the optional chaining"
 We should use `?.` only where it's ok that something doesn't exist.