In fiction, it's usually human superheroes without powers like Batman or Green Arrow, that use tech or depend on tech to make up for their lack of superpowers.
Not all metahumans are bulletproof, but I still see that it's common for metahuman characters to not have any tech at all.
There is a character called Black Canary. She has a sonic scream power. Depending on the version this power is either tech-based itself or mutant/meta-based. Either way, the character doesn't wear any protection. She just dresses in street clothes and screams at bad guys.
Another example of this is a character called Iron Fist. He has Chi Energy-based powers. Iron Fist isn't really a durable character. Some versions of this character can even run out of Chi and become more vulnerable like a normal human, yet this character still chooses to wear a costume with his chest out.
This makes me wonder. Is an audience less likely to be interested in super-powered characters who depend on tech, because the tech can take away from their superpowers?