Likewise, coding is easy. It's just writing, and any child can learn it. Coding is not programming, and the hard part of the job lives in that distinction.
Any teacher of a low level CS course knows this is completely untrue. In my CS 101 course our problems were relatively straightforward and short, and lots of people struggled mightily to the point of dropping the course. IMO coding requires a particular way of thinking that a large subset of people just aren't good at, and as someone whose done tons of screening interviews at college recruiting fairs where I give relatively easy problems and ask someone to code a solution, I will tell you the idea that anyone can do it is just false.
In it's original context, it's very clear what "Code was never the hard part" was referring to, that of all the steps of product development (ideation, requirements, design, implementation (coding), deployment, operations, maint, etc.), that code was not the hard part. That's the meaning we should be discussing, and I agree with the author, I believe coding very much was the hard part. Since Jeff Dean and Sanjay Ghemawat were recently in the news, I recall some stories about them fixing issues with the search index in the early days of Google where there were random bit flips that were causing the index to be corrupted, and they fixed it and coded a durable solution. This is very much just a code-specific problem that very, very few other people would have been able to solve.
English has simple conjugations. That makes it much easier to learn to speak intelligibly even for adults. Old English dropped many of the complicated word endings because it was used by Anglo-Saxons with Vikings and Normans.
Understanding of grammar and rules of a language is like having good bricks, but building a stylish house is more than just using good bricks. It's a higher level cognitive exercise. Schools attempt to teach this, but i think they fail quite miserably (look at how essays had to be written by students, and how poorly most are written).
Methinks you're splitting the wrong hair here.