See for instance Massachusetts model jury instructions, which are explicit that opening an unlocked door constitutes "breaking".
Reading that WP article again, turns out I was just considering the common law part. It later says:
> The common law definition has been expanded in most jurisdictions, such that the building need not be a dwelling or even a building in the conventional sense, physical breaking is not necessary, the entry does not need to occur at night, and the intent may be to commit any felony or theft.
So I'll give it to you for "physical breaking is not necessary", even though I don't actually know about the jurisdiction in question. (I didn't rtfa.)
I don't see how you could access a computer without using "force", any input from a human constitutes force in my opinion. So no disagreement as far as the actual crime is concerned, I'm just nitpicking for fun...
You can walk into a house through an open door,
but you can't walk into a computer.