UBI isn't a reality in large parts of Europe. There might be a handful of local experiments here and there but nothing on the scale that "large parts of Europe" suggests.
That's why I added "more or less". Housing, health insurance and essentials being taken care of by the state + cash money is UBI for these intents and purposes. It's only given to the poor, and society would prefer if you didn't require assistance, but the argument was that it would decrease crime because people needn't worry about finances as much, for which it serves as functionally equivalent. Whether you call it UBI, Hartz 4, Kontanthjælp or something else is mostly semantics with regards to "if people get money, they won't commit crimes".
UBI has other parts which aren't covered in that regard, but those aren't relevant to the question of crime motivated by poverty.
Both cost money (=resources). Money is limited. Who do we focus on?
As for that theory on "no excuses": UBI is more or less reality in large parts of Europe, yet crime still exists.