Definitely too skeptical. Every piece of research that 23andme uses to interpret your genetic data is backed by a wealth of citations and studies. Each "discovery" is rated on a confidence scale from 1 to 4, with experimental research being a 1 and undisputed, established research being a 4.

Nothing's stopping you from downloading your own genetic data as a text file and performing the same types of analysis yourself.

Also, Occam's razor.