Why the all caps language? Are you aware of how rude it is to shout at people on the internet just because they disagree with you? Did you notice that the OP just asked what TTW means?
When you say that keeping our models light is always a plus, why? On what are you basing that statement?
When you say WE ARE NOT supposed to be building bullet proof rockets, again, why?
You seem awfully angry over this issue, can you explain where all this emotion comes from? Don't worry, you're in a safe place and we all love you. It's all going to be okay.
Why Yes I did and did you see that I answered the OP's question completely for all phases of the hobby?
As stated earlier Overbulidling is the Bane of rocketry. No anger it's simply the truth.
Bulletproof building is going to hurt or kill someone, actually there already have been several injuries casued by such vehicles. When someone is killed that will be the end of a hobby I've loved for more the 45years. Over building MUST be serverly scaled back or stopped completely at least for LPR and MPR Models.
The sole purpose of keeping our models as light as possible is to absorb kinetic energy when it hits something or someone rather then transfering it to the object being hit. I build crumple zones into my LRM models just for this purpose.
TTW is just another example of totally unnecessary building that actually weakens the outer airframe particularly if using thin-walled body tubes, Granted TTW is the standard method used in HPR but the OP was not asking about HPR. As stated earlier there are other methods that have proven over the years to be just as secure as TTW without cutting slots in the tubes. Epoxy rivet method is one such technique used on Larger models, not standard size few ounce to 1.5lb Model Rockets But those heaver model or with Clear Lexan fins. This proven method even works on materials that do not accept glues or adhesives like Polypropylene. Standard Butt mounted fins are perfectly fine for the majority of Model Rocket builds, and if double glue joint mounting wood to wood or wood to paper(cardboard) are stronger then the two materials being joined. Add a simple Fillet to these joints they will stand up to most any non-ballistic impact. Another point is the lighter we construct the model the LESS LIKELY it is to be damaged by a no deploy or Chute Wadding ball recovery. I have a couple hundred models build without a single TTW fin many of which have 30 or more flights without a single fin joint damage. Some of the tips get rounded off being dragged but the Fin-Body joints stay firmly attached.
And one more thing: While it is true leaving the Cap Key locked on while typing an entire sentence or paragraph is considered shouting or being rude. Using Caps to draw readers attention to a specific word or phrase is Not being rude it's used extensively in writing as an attention getter. There is no anger simply drawing attention to important points or items.
To think or believe the use of any All caps is always shouting is another mistaken reading of PC rules.
Hope that answers your questions.
Edit: As always we all have the right to build our models anyway we wish, but we also have the obligation to express opinions concerning Keeping our Hobby the Safest outdoor Sport/hobby on the planet.
Over building is such a threat.