Yes, but what he says does make perfect sense. In increasing the amount of air you also increase the amount of particles going through the filter.
In laymen s terms say your filter is good down to say 100 microns. If you increase the air flow through the filter you increase the number of particles less then 100 microns that will pass through the filter and enter the engine. The fix would be to change to a filter that is good down to a smaller particle size, which also will decrease air flow.
If your media is designed to filter at a 100 micron level, it will filter at a 100 micron level. You are only limited by CFM through the amount of negative static your system can generate. You'll either starve the system due to fan laws, or you'll pop the media with enough pressure drop.
The fix you called out above is EXACTLY what the aftermarket folks are doing. They
ARE filtering to a smaller particle size, but they are
also increasing the surface area of the media....deeper pleats and more pleats per inch.
If the surface area of the media did not change and all you did was swap the media for a better filter rating, you would still flow the same CFM, but at a greater static pressure drop.
Low static drop is the key to flow. The motor is going to pump what it needs, you just want it to be as unrestricted as possible. The only way to filter better
and minimize static pressure drop across the filter is to increase the surface area of the media.