> The constant use of “I” (Wo) is a modern invention; classical poetry usually omits the subject to create a universal feeling.

我(Wo, "I") has been constantly used for a very very long time. Just less in poetry. For example, this is from early 19th century[0]:

>> 嫣娘答應著，出來三步兩步，連忙跑到園裡，一進門就高聲說道：「我回來了，我可也回來了！」

This is from Journey to The West, 16th century:

>> 我等在此，恐作耍成真，或驚動人王，或有禽王、獸王認此犯頭，說我們操兵造反，興師來相殺，汝等都是竹竿木刀，如何對敵？須得鋒利劍戟方可。如今奈何？

This is allegedly more than 2,000 years(!) old[1]:

>> 帝力於我何有哉

Actually, there are pronouns specifically created for western text:

- 她 (she)

- 妳 (female you, no longer used in mainland China)

- 祂 (originally this character was only used for He and Him in the Bible).

The author mentioning 我 instead of these makes me question how knowledgeable this article is.

[0]: https://zh.wikisource.org/zh-hant/%E9%A2%A8%E6%9C%88%E9%91%9...

[1]: https://zh.wikisource.org/zh-hant/%E6%93%8A%E5%A3%A4%E6%AD%8...