Hope this helps explain things a bit more.
Yes. It explains to me that after 20 years of photography and film that other people will always google something and assume they know everything.
Correct lighting is of course required. BUT as I said NO COMMERCIAL PHOTO GOES UNTOUCHED. No professional photographer works with inferior or complete lack of equipment. Talk to a photographer and ask him what lenses and filters he / she uses in any given situation.
I only mentioned what has proven to work for me from EXPERIENCE.
I could present any number of technical problems from a videographer / photographers point of view with the information you presented . . . . but there is little point.
What if the photographer required the use of the flash for a still in a particular situation? and had no other light source to redirect or diffuse? Would there be no other way to diffuse the light? (this is only one SMALL example) What if one wanted particular shadows? what if one wanted to highlight particular features? what if one wanted to highlight certain colors? what if one wanted to do this from a forward light source?
One is fairly sure he paid good money for a high quality diffuser that he has used in that exact situation many times.
In stills and video there will always be a need for many kinds of light / angles / highlighting / etc etc . . . thousands upon thousands actually. It takes many years for a videographer / photographer to learn them and he / she will never learn them all.
One only tried to help. Perhaps others will see and understand the information presented.
Peace