not everyone is a drifter that requires $xxxx suspension mods. His plan is quite similar to mine, 95% street use. Coilovers are overkill for that honestly. I agree coilovers are worth it if the goal is to get the most out of them.
My example for myself, being similar to his, is that im way too lazy to really adjust the ride height on my car or actually mess with dampening settings. it would be nice if i made it to all the drift or autocross events, but for just ripping it up on the street, i cant justify that money spent.