You don't need specialized knowledge. You just need to have the motivation to seek out sources that aggregate and distill knowledge. When people buy TVs, cars,

You don't need specialized knowledge. You just need to have the motivation to seek out sources that aggregate and distill knowledge. When people buy TVs, cars, fridges or shop for a laser eye surgery procedure, they seek out credible third party assessors, in the form of Wikipedia articles, Consumer Report magazines, end user ratings, etc to inform their decisions. The collective intelligence of the consumer market will also increase as more people participate as price and quality conscious consumers.