I've seen some excellent aquarist who happen to be gals. Karen Randall and Diana Walstad come to mind pretty fast. Smarter than the guys in the plant hobby I've met
Here's the Tropica article.
Read it good, see how not adding CO2 at low light and adding it effect things.
Look at their conclusion.
You can see that under either CO2 or nutrient limitation stress, the ability of the plant to grow is reduced.
This is why using less light+ good non limiting nutrients(sediment and water column) and then focusing strongly on CO2 makes things much easier.
This lower light also slows the growth rates down and ina very stable easy to manage way, much easier than any other growth rates management tool we have.
Ole, Troels and myself complained about the hobby some here when they gave a talk, saying many hobbyist do not understand this basic tenant of how a plant grows.
How can anyone explain nutrients if they do not understand light and CO2?
Very hard. Maybe some got lucky and had a decent balance, or has a lot less PAR than they really do comparatively, or they had good CO2 at one point.
Many others are not so lucky.
But it should not be so much about luck or belief.