NFHS Free Throw Question

Here are the two paragraphs from the interp in question with emphasis added:

"Clarification Preseason Guide Article “Enforce Illegal Contact on Free Thrower and Violations During Free Throw”, page 6, second paragraph: The free thrower must remain within the free throw semi-circle until the ball contacts the basket ring or the shot is made or missed. The same rule applies to all other players who do not occupy free throw lane line marked spaces. Players who occupy free throw lane line marked spaces during free throws may enter the free-throw lane upon the free thrower releasing the ball; however, should a defensive player cross the free-throw line too soon, it is a violation. A delayed violation signal is to be displayed. If the free throw is successful, the violation is ignored. If a defender contacts the free thrower, a personal foul is the correct ruling. If the free throw is unsuccessful, the violation is enforced and a substitute free throw is awarded. If a defender contacts the free thrower, a personal foul is the correct ruling. Whether the free throw is or is not successful, the penalty for the personal foul is awarded. If the free thrower’s team is in a bonus situation, the free thrower would be awarded a one-and-one or two free throws. If the free thrower’s team is not in a bonus situation, his or her team would be awarded a throw-in along the end line.

Comment: Rule 9-1 does not address the issue of players, other than the free thrower during the free throw, entering the semi-circle. The national interpretation on this issue is during the free throw, anyone entering the semi-circle has created a violation. If it is a team member who violates, the ball should be blown dead immediately. If an opponent violates, it is a delayed lane violation and the free thrower should be awarded a substitute throw if the free throw is missed."

The first paragraph only mentions a defender, which seems to suggest that it's only a violation for a defender. The second paragraph does seem to contradict that. However the POE also seems to make a distinction between "crossing the free throw line" and "entering the semi-circle". Why this difference? The first time I read it my understanding was "crossing the free-throw line" applies to defenders in marked lanes spaces whereas "entering the semi-circle" applies to players outside the three point line. I don't think they refer to the same thing because they are worded differently. If they do refer to the same thing just from different angles then the wording is stupid and obtuse.

My questions to the NFHS: if you intend for any player (offense or defense) entering the semi-circle area then why write it two different ways? And why only mention a defender in the section about "crossing the free throw line"?

Using my common sense I can't imagine why it should be a violation for an offensive player in a marked lane space to "enter the semi-circle area" before the ball hits the rim. It makes sense why a defensive player can't do it (to avoid contact with FT shooter), and both types of players outside the 3 point line can't enter anyway until the restrictions also end on the FT shooter.

Yet another thing the NFHS could be crystal clear on but words things stupidly so refs like me misunderstand.