Mathematically they’re equivalent, but the feelings could not be further apart.
I’ve often wondered why people gravitate so much to quarter and even half helmets for this reason. They do protect your head better than nothing but also expose your face (in the case of a quarter helmet) to the ground.
I suspect that, for some, it is the misconcption that the visor limits field of view in a meaningful way. Might have been the case 40-50 years ago but seems a rarity with modern helmets.
Back on that site that sounded like read it I asked some of these people and it just boiled down to “because I can/freedumb”.
Ah yeah. I forget about that set of bikers often as I only associated with the ADV folks who are all about ATGATT. Really weird to me to think that people actually want to be PPE luddites and miss the chance to wear a modern suit of armor, without being out of place or violating the laws of some municipalities.