However, as a musician, this sort of article makes me uncomfortable. He says: "In this post, we will be discussing rhythm basics and all things related." Not exactly. He discusses rhythm basics from a certain cultural background, roughly western European mainstream music of the present day.

His discussion focuses one particular notation (whole notes, etc.), one particular tool (a sequencer), and most of all one particular musical language (mostly 4/4 with a backbeat, and typical mainstream instruments, electronic keyboard and drum kit: kick, snare, hi-hat).

Music is not limited to that which can be quantized.

His discussion of swing is primitive. He probably doesn't play jazz, though I can't say for sure.

I don't mind that he approaches from a certain place. It just makes me uncomfortable that he omits his background to the point where a beginner might mistakenly think the post is somehow universal.

I do agree that it would actually sound like music if he played all the notes in the same key, which you can do by following the lessons from part 1 of the same series.