It is, and more than that.
Your account is 80 days old, you've commented four times in total one of which scored a -4, and you've submitted - this entry included - twice.
And you're already ready to pass judgement on what HN is or is not.
HN is what you make it, you'll find that if you participate in stories related to the subjects that you indicate and if you post more stories related to those subjects that it is indeed exactly that - and more.
The 'more' is all the other stuff that you are apparently not interested in.
Like any other forum HN is scoped, it is scoped narrowly enough that it is possible to say what does and what does not belong here, and the stuff you indicate ('entrepreneurial ventures for web developers') is about as on-topic as it gets here.
Don't say the cake is not to your taste before you've at least done more than looked at it.