English weirdly use feminine for ships, so think of it like that. But no it doesn’t achieve much.
I don’t think it change the way we think about objects much, but probably unconsciously yes. For example, France itself is feminine and seeing some caricature personifying as a dude always feels weird.
Usage dictates the gender. And some recent words are more or less controversial: gameboy, wifi, COVID, Nutella…
When I think about the gender of a word I will usually derive it from a broader category. But that’s not always obvious, for example Gameboy is a game console (feminine) but the words game and boy are masculine. COVID is a disease (feminine) but also a virus (masculine). And in the meme a washing machine is a machine (feminine).
You can’t not use gender since french doesn’t have neutral pronouns. But I don’t think it’s frowned upon for a non native speaker to make this kind of mistakes.
Old English used gender, and there are a few vestiges of it left in modern English. A couple adjectives can still use it (blond man, blonde woman), and a few nouns are still in use (actor vs actress). Some of those nouns have basically fallen out of use in the last few decades, like how pretty much no one uses comedienne anymore.
