Macron is a clown and his opinions on language don’t matter.
With that out of the way, grammatical gender in French is a really complex topic.
“Inclusive” language is centuries old through the usage of parenthesis or slashes. Somewhat recently, attempts have been made to codify this practice using a new syntax (auteur·ice), which conservatives aren’t on board with (either because they don’t want change, or because they can pretend it’s a new cultural import from the US and wage some invented culture war).
Progressives aren’t universally on board either. The new syntax is quite clunky, doesn’t translate to spoken speech, is quite inaccessible to dyslexic people, and completely exclusive of genders outside the binary.
This is all complicated by the fact that French is a very rigid language whose rules are practically set by the “French Academy” (which is a whole other can of conservative worms) which unfortunately gives old curmudgeons immense power to strike down any evolution of the language as “officially improper”. Imagine if the Oxford Style Guide or whatever was uniformly taught throughout the English speaking world, and from Mumbai to London to Auckland any step away from these rules at school would get you points deducted, and all administrations were forced by law to follow these rules. Then imagine that it’d been that way for longer than anyone’s been alive. That’s the world the French live in, and the very concept of written language being “alive” is fundamentally something most people either disagree with outright or at least look at with suspicion or a vague look of incomprehension.