I think the moral of this story and much of other stories. All tank should be treated as an individual. Really depends on individual goals. Different situations have different needs. Low light less demanding plants shouldn't follow high par hungry plants fertalization regiments. High light, high demanding plants wont do well in lean fert low light tanks. 1 thing we all have in common is consistent co2 and good tank maintenance.
Exactly, well put!
A careful selection and plant plan for a scape from the beginning prevents problems later.
If you have all low demand plants than you can use lean water column ferts and don't even have to bother with root fertilization, I don't.
If you plan on having a mix of high and low, getting the balance is tricky and you might benefit from a rich substrate or selective root tabs, water chemistry becomes a factor (hard or soft, low kh, high kh), and achieving this balance comes with other caveats and keeping the tank cleaner could be more difficult.
The pro and competition aquascapers know their plants, their needs, and how to balance the tank. They typically use a limited number of species well known to them where the growth behaviour and needs are predictable and work well with one another.
Light control becomes key throughout the stages of growth of the tank especially during early stages and one must be careful not to overdo it.