"Lack of exposure" refers to not having enough experience or knowledge about something. It means not being familiar with or having limited access to certain things, causing a lack of understanding or awareness. Full definition
While individual titles may still suffer from lack of exposure, the indie game scene as a whole doesn't. (joystikrevolution.com)
Scientists have long suspected that allergies and asthma — common in the developed world and relatively rare in poor countries — are the result of lack of exposure to microbes. (sciencemag.org)
A simple lack of exposure at the right time can result in an adult dog who is unable to cope with normal life. (drjensdogblog.com)