The reality is the police are more than happy to act when the criminals involved can be identified, and are under their jurisdiction, and you can get the attention of the right department - that's just a very rare set of circumstances.
The Act explicitly mentions prosecution of offences committed abroad.
Going after scammers overseas will commonly cost in the millions per case. It's insanely expensive, and there are a lot of scammers.
[1] Source: I am that poor ex-bike owner and I know anecdotally my experience is not unusual. I live in a nice area and a person in my neighbourhood had the steering wheel of their car stolen (for some reason) again, the police did nothing.
They did get away with it for two years (2019 to 2021) and the article states there are other small groups doing exactly the same thing right here right now, so it isn't that stupid to think you could get away with it if you are very careful (and at least a bit lucky) and know when to cash out & move on.
Their chat log (apparently) makes it clear they were independent operators, at least.