There’s a difference between passively using something and actively using something.

I use electricity every day, but I have no idea how it’s generated. I (assume I) use RSA256, but if you ask me to explain block cypher encryption to you I’d just go “well you take a number and another number and… hope they have sex to produce a bigger number?”

I use a lot of stuff without having to know how it works and having to choose to use it.