All in all, they're young or new to the car scene and it's part of learning. They'll learn that it's not all black and white as it seems but it's up to the knowledgeable people to explain.
Maybe I've been around as you have because I think the same thing too. A lot of young people I talk to (esp 17yo's hanging to get their P plates) tell me they're chasing X-hp and they're going to do intercooler, FMIC, boost controller and bbearing turbo to achieve that. Soon they realise it's an expensive exercise becuase ECU is needed, injectors, dyno time, problems getting power to the ground, etc...
A mate told me that he wanted a MAP sensor on his SR20 with a GT25 BB turbo. Ask him why and he can't give you an answer.
Honestly there is no magical formula to get 400hp or run 12 seconds down the 1/4. I continually have to explain that a dyno is just a tuning device and 400hp on one dyno is not 400hp on another. And to run 12 seconds the driver better be up to scratch too.