And modified to come somewhat close...what kind of BS is that - either it's the same or it isn't. If the boundary line isn't used as THE definitive determinate then it's still subjective.
there is absolutely no requirement that the NFHS rules have to be identical to the college rules. In fact, in most sports, there are variations between the HS rules and the college rules. So keeping that in mind, it's kind of stunning to me that anyone thinks that the rules for HS and for college should be identical.
The biggest issue, IMHO, with the boundary line in HS wrestling was for pins and for NF. It used to be that you could not pin a wrestler, or get NF, if the defensive wrestler's back/shoulder blades were outside the line. That has been changed. As long as there are two support points within or on the line (looking at both the defensive and the offensive wrestlers support points), then it's now possible to pin or get NF points in HS. That was a huge change, and it's improved HS wrestling.
As for TDs, I don't get what the problem is with the HS rules. If the offensive wrestler hits a double and the defensive wrestler lands completely OOB, and the offensive wrestler lands basically OOB, the offensive wrestler is still given a chance to bring their toes/feet, which were in the air, down, and if both land in or on the line, then it's a TD, unless the defensive wrestler is off the mat. Beyond that, the difference is:
college - if one supporting point is inside of or on the line when control is established, it's a TD
HS - if two supporting points (can be 2 from def wrestler, 2 from off wrestler, or 1 from each) are inside of or on the line when control is established, it's a TD
There are differences in hand-touch TDs between HS and college, and college does have danger zone TDs which are not part of HS, but neither of those are boundary area issues, so they're not germane to your complaint.
In my earlier response, I indicated that the NFHS, when it made changes to pins/NFs/TDs with regards to the boundary line, they also provided some explanation for their changes. They are fully cognizant that a lot of schools (and keep in mind that HS rules are also middle school rules, with the exception of weight classes and the length of periods) do not have a lot of space where they wrestle. Many of those schools use smaller mats, or mats that have a small apron on them. Expanding the apron by adopting college rules is a problem in places where the edge of the mat is against the wall, or the mat has a small apron. And the NFHS is unlikely to adopt rules that force schools to buy new (and bigger) mats, or find new places to hold matches that have enough space for an expanded apron. Those issues are not prevalent at States, or in many HS gyms. But the NFHS doesn't differentiate between what can take place in big arenas and what can take place in postage-stamp size rooms. The NFHS rules have to be standard across the board.
As for your last sentence, I have no clue what your point is. Feel free to clarify that.