the hobby is one thing aquascaping is another. Aquascaping IMO is the next lvl. of planted tanks. It may have started from the fishkeeping/plantkeeping hobby but it evolved into somethign else. Thus your statement "but if people really want to dock points against the planted tank that doesn't use them then this hobby has some problems" is a bit out of context. I have NOTHING against planted tanks that do not use high tech because aquascaping is one thing and planted tanks are another.
Also what you said about Amano is very true, there are more than 5 ppl backign him up, selecting the plants, etc., they are his "students" if we can call them that. But aquascaping is not all Amano. There are many many more that have nobody around them to do the "crappy" work for them. Most actually do it all by themselfs. And even those who do the work for Amano do it under supervision and under strict "orders". They dont just take what they want and put it where they want.
My point still stands. If you want an aquascape you need high tech.
Now for your questions "Are we going to need any more rules though? So low tech as in zero fertilizers or what? Will lighting levels matter? or as long as its low tech is okay?"
No, low tech is not 0 ferts but it is low tech ferts. So you cant use the whole range of ferts from the best there are on the market. That would make it expensive and high tech. If you buy the whole range that Tropica has to offer for example and use them you are not going low tech.(Tropica was just an example, it can be Easylife or Seachem, etc.). If you start using PO4, K, NO3, Fe, flourish excel and stuff like that you are not going low tech. Lets say you can use JBL ferropol and ferropol 24, those are pretty low tech ferts, also cheap. Tho IMO low tech is also not using ferts or using very few and dosing rarely but lets say something in the low range can be used.
CO2 is out the window, that to is not low tech.
Expensive and good/powerful lights are also not low tech. You cant use 3WPG(or more) that would mean powerful light and that aint low tech.
You cant also use special substrate(the stuff that you can buy from your LFS) for example ADA and stuff like that, that is also high tech.
You can use tho the low end of the stuff you need.
Now do not get me wrong, low tech light dont mean you need to use a lightbulb or a candle. But no special plant light like the osrams and the "made for plants" lights.