>Things like tone and grammar are the very basics that you learn right at the beginning.‡ Beginners complain about them, but after a few months of studying Chinese, you should be fairly comfortable with the tones.

Disagree slightly with this- pronouncing the tones individually and getting to the point where you can be understood isn't too hard (well still hard), but combining them when speaking more quickly is more challenging, especially if you want it to flow nicely, and adding emphasis while maintaining the tones. Not that it's mandatory if you just want to understand/be understood, it depends on one's goals.

It's a common misconception that it's enough just to learn the tones and move on and it's very hard to find teachers who are able to help with more advanced pronunciation

> 2. The writing system, which because it's not phonetic requires essentially the same level of effort as learning an entirely new language (beyond spoken Chinese).

This is an interesting observation. Another one that I sometimes mention to my friends who didn't have an occasion to learn Chinese before is that in this language speaking, reading and writing are actually 3 separate components. You can read characters without knowing how to write them properly or even remembering them entirely. Lots of my Taiwanese acquaintances forget how to write certain characters, because nowadays most of the text they write is in bopomofo on their phones. Bopomofo represents sounds, so basically knowing how an expression sounds and being able to read the character (pick it from a set of given characters for the chosen sound) is enough to "write" it.

Your comment is written as it learning a language was not a subjective experience, which could not be further from the actual thing

Yours is the first comment I strongly agree with; as a multilingual/bicultural Asian American, children don't have this supposed difficulty hearing tones.

Most of it is passively paying attention. It should not be a struggle, it's one of those the more you struggle and overintellectualize the less time you are focusing on paying attention and letting your hearing ability do its work it was evolved to do.

The other thing is this whole emphasis on accents is misdirected. Teachers do not place this excessive emphasis on accents, it is people who want to sound "authentic" which is not a very wise goal of language learning in the first place.

I do think that learning music can help a little, especially a sonically complex instrument like violin and the like.

(caveat: I'm way oversimplifying on my Saturday afternoon, but that's my tentative views on this that I would try to argue for.)