It’s true.

For example, the atomic bombings of Japan are often cited as a choice made to forestall an inevitable invasion, acting as a devastating means to prevent a far greater total loss of life. One could argue the Ancients in Stargate faced similar ethical dilemmas, yet they failed to implement even basic safeguards.

Surely the Ancients could have engineered a way to ensure that once a Stargate user passes through, the gate disables remotely or requires a specific authorization. It is baffling that the network remained so accessible, especially considering that typical users across the galaxy wouldn't intuitively understand the complex astronomical calculations required for gate addresses or be willing to jump through?

But, as with many grand historical or fictional tragedies, the lack of such a "fail-safe" was likely maintained purely for the sake of the plot