system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] why are night vision and thermal devices so uncommon in the galaxy?

Walkers, speeders, tanks, and even ships; you will always see these use headlights and spotlights in the dark and adverse weather conditions, even in combat.

However, we know night vision and thermal sights and devices do exist in the Star Wars universe, because we have seen these a few times, used by special forces, mandalorian armors and in the Slave I ship.

So, how come most ground war machines and ships aren’t equipped with these as a norm, and, instead, are limited to flashlights?

Like, even nowadays every war machine is equipped with night vision and thermal sighting... is there any in-universe explaination why these aren’t common or popular?
gpt
Intimidation is the primary factor. The Empire doesnt need to be sneaky, they have all the toys. Their military doctrine doesnt require night vision as the norm. 

Secondly, its another point of failure. Why use nigh vision more when cheap and easy to use lights get the job done?