I've about convinced myself that there are way too many factors to ever make a set determination of what we can grow, however reading the experiences of others combined with set established parameters helps us make decisions on how much effort or money we will spend on any particular plant.
For example, everything I read tells me Pogo's and Val's should do well in my tank, yet I've tried them both three times with the same results, yet there are other plants that should not do well that are growing like weeds.
There are way to many specific and local environmental issues in our tanks to make valid determinations for a specific plant making it or not making it, we can however ponder semi-educated guesses why but that's it. And unless your Tom Barr who has devoted his considerable intelligence, ungodly amount of time and God knows how much money, then you will probably never know the why.
I've become more pragmatic, if it doesn't cost a fortune, buy it and try it, if it lives it lives, if not..................