Well, feel free to not use any of the things developed from scientific advances. I hear that caves are comfortable year round, and herbs and grasses picked from the mountainside can make a fine salad!
Scientific advances happened long before peer review and scientific advances are happening in spite of peer review.
Peer review is just a fancy concept invented to make it look like scientific publication is blind to "politics". It is quire the opposite. Scientists are asked to volunteer their time to review peer papers without pay or compensation. The hidden compensation is that they get to push their friends and colleague's work ahead of the pack and the favor is returned.
If you check journals and publications, you will find the same group of people publishing over and over again in the same set of journals and publications. If you read through them, you can tell they are churned out papers aimed at a publication rather than some scientific advancement.