adjective
cavalier
kav-uh-LEER/ˌkævəˈlɪr/
showing little concern for something important
The woman takes a cavalier attitude toward safety atop the stepladder.

Etymology
The horse-based formation originally named a horseman, then a knight or gentleman, sometimes disparagingly a swaggerer. The adjective shifted from “gallant, knightly” through “easy, offhand” to the modern sense of disdainful disregard.
In context
EOD being risky cavalier cowboys there's maybe an association or an implication or something. That there's so many people with their name on the wall who died in combat because they were that way
More examples
- She resents their cavalier dismissal of her concerns.
- The report criticizes a cavalier approach to public funds.
- He gives a cavalier shrug when asked about the damage.
Similar words
- dismissive
- Emphasizes rejecting something as unworthy of consideration.
- careless
- Can result from inattention rather than confident disregard.