Not really when an idea of "trusting your ears" is widely used as a sales pitch and extreme lack of education of consumer on how to read and comprehend those graphs.
Notably before 90's graphs, schematics and detailed reference manuals had been provided with purchase, but after 90's such documentation was replaced with wording of not to go "inside box" to avoid electric shock.
Educated consumer might not "trust" unless information provided. Therefore such education has been diminished so sales can go quicker and larger.