Yes, cool. It's awareness.

They're not talking about language with the male-as-default, but rather for example this:

The depiction with less discerning features is what we assume to be male. If you want to express female, you have to add a dress or long hair or curves etc..
There's actual scientific research on this bias existing, although I don't know in what way this extends to animal depictions.

I grew up in a very male-as-default English-speaking culture. Any animal, robot, or plant would be referred to as it or he, unless that creature/thing has additional female markers such as wearing pink, makeup, etc.

For examples look at the designs of Mickey and Minnie Mouse or Babs and Buster Bunny. If you draw a little blob with eyes, people will say "He's/It's cute." If you put a pink bow on it, they will say "She's cute."

You can even look at the word "woman" itself. "Man" originally just meant any person, but "woman" was invented to speak specifically about a "wife-man." Going to your German examples, why did they make special words for female bakers, etc. and none for male bakers? It's because male is the default and female is a deviation from that norm. You don't need a special word to describe the default assumption.

There's this old riddle:

A father and son are in a car accident. The father dies at the scene, and the son is rushed to the hospital. When he is taken into the operating room, the surgeon says, "I can't operate on this boy! He's my son!" How is this possible?

It plays on one's assumptions about gender.

Have you ever seen 1s and 0s out in the real world, outside your smarty-pants books? Thought so. Maths don't real, checkmate atheist.

And in german (if I’m not mistaken) fox is Der Fuchs, so boy.

That's true, but the grammatical gender has nothing to do with the actual gender. Nobody thinks that all foxes are male, just as nobody thinks that spoons (Der Löffel) are male or the street (Die Straße) are female. They can also change depending on the amount. For example, if we take "Haus", which means house, we say "Das Haus" if we talk about a single house, which would be neutral, but refer to multiple houses as "Die Häuser", which would be female. Nobody thinks houses become female once there's more than one tho.