No, it's just another way to rephrasing things so you think about the algae issue correctly.
Do you think that you must have lots of shrimp to keep tonia or any plant algae free?
No.........
This issue is really one of CO2.
I have seen this on Tonia in many tanks, and the CO2 is the root issue.
If the KH is lower, say 4 degrees or less, then you should be okay, other than CO2, and lower KH, the plant is not that picky, nor demands high light.
As you have okay growth on the top, you are still having some growth, just not optimal. The algae of this type is telling also, it really suggest suboptimal CO2.
I've seen this same picture in other tanks here and adding a bit more CO2 took care of it. It might not be as simple as adding a bit more CO2, you might need to clean things up, add more plant biomass, change some filter issues etc.
Current, filters, surface movement all influence CO2 and can a great deal.
Large frequent water changes in the morning right after the lights come on can tell you quickly if it's a CO2 issue, as the plants will pearl and do much better that day and the non water change days.
Regards,
Tom Barr