You're right; it's bad practice. Sometimes I just want to talk tech and it's easier for me to talk about a tangent that I undersand than to stay on-topic when I don't have any knowledge, but that's a bad habit when it comes to a post on someone's article. I'll eliminate this behavior.

I think such related discussions can be interesting

There's nothing in the guidelines against bringing up related topics -- instead it's just the gp's personal opinion

https://news.ycombinator.com/newsguidelines.html