The point is: if you have bought some SRC-20/BRC-20/whatever tokens and they sleep now in your wallet waiting that your once-valuable bag which is now worth almost $1 will appreciate again. Most people probably have 10-20 token-related dust UTXOs or so, not much more (because a single BRC-20 transaction only creates one or two of these UTXOs). These dust UTXOs together will perhaps be worth 2-5$.

We have now 2 scenarios:

- The tokens magically appreciate and go to $100. Then their owners will probably try to sell them as fast as they can. And with them, the UTXOs will (perhaps) be moved, but they would be a minor issue.
- The tokens stay at $1 or go to $0.10. Will they try to save at least their $2-5 of the dust UTXOs? It will take them more time to "consolidate" them than the value they could be saving.

Probability for case 2 is higher as for case 1, so at least 50% of these UTXOs will never be moved. And thus, from the incentive point of view, it would make no sense to run The Cat, a big operation to save Bitcoin!! (having to run ord and other buggy external software which even may contain malware in some cases) to invalidate them.

Then there are the Stampchain UTXOs, which are also a few millions. These will never be spent, it's not even possible because they are based on fake data. So it's extremely important to invalidate them again with The Cat! Because WE ARE FIGHTING SPAM!

BTW, the second kind of UTXOs can simply be deleted by any nodes, without needing "The Cat" nor other amateur "BIP" from some first-year coder with messiah complex.