Why don't we get a shock from neon tester?

A neon tester does not deliver a shock because it operates at a very low voltage and current, typically around 90 volts and a minimal current flow. The current is insufficient to cause harm or a noticeable shock to the human body, as it is designed to indicate the presence of voltage rather than to conduct significant electrical power. Additionally, the neon bulb lights up due to the ionization of gas inside, not because of a strong electrical current passing through a person.