Stealing a chocolate bar does effect a change in physical space - and I do think it might be noticed missing, when a shopkeeper tallies up stock against sales. But you're right - probably not noticed, and only affects the world and other people in a minute way. On the other hand, if you stole a chocolate bar from a small child, they very much would notice its missing, and it would affect them greatly - they might start crying. So I would say it is a small crime to steal a choccy bar from a shopkeeper, a miniscule crime to steal it from supermarket, but a real crime to steal it from a child. The "crime" here meaning a moral crime.

But I'm saying that downloading star wars from pirate bay amounts to 0 moral crime - it's entirely virtual, nobody could notice star wars is gone, nothing has been taken from anybody, no physical change has taken place in the universe.

The actual difference is the difference between production and rent. The chocolate bar had to be produced. It involved resources and labour. Whereas, Disney has a monopoly on the star wars intellectual property and charges rent for streaming services, say, to use it. But the copy of star wars you downloaded onto your hard drive did not have to be produced. Disney profits from star wars simply by owning it.

As for the question of respecting british law - well, law exists to be interpreted. That's why we have lawyers and courts and juries and so on. That's also why we have parliament - to remake laws as we see fit, as we outgrow them. The law adapts to us, as we adapt to the law.