Not sure I agree. It's much easier for me to find the link icon than "Insert Link" in the Google Docs example. It's seem pretty close to a standard icon so, for me at least, it's helpful to find it. Same wit some of the others like increase indent, decrease indent, left, right, center justification, and lots of others.

I can also be helpful for non-English (or non-language of your choice) when you haven't had time to localize or don't have perfect localization. Let's assume the user has Japanese as their second language. It's much easier to find the option you want with icons than without

With apologies to our American friends, Jeremy Clarkson had a take on this:

https://www.youtube.com/watch?v=z7kXUbwngB4

Somewhere in there, I think he does have a point.