> The whole vesicle theory is built on a physical/mechanical process ubiquitous in nature,that so far has no connection with life.

To be fair, the conditions that were ubiquitous on Earth when life first formed are now extraordinarily rare, if they exist anywhere at all on the planet.

yes, and many experiments have shown.that analigs of those conditions have yielded various amino acids usedby life forms, but never amino acids inside vesicles. foams/vesicles are ubiquitous positing there existance and conflating that with life on Titan is a big ask, if, IF they has included a statement along the lines that "vesicles are certain to be found anywhere in the universe where liquid water exists" then it would be completly acceptable and could be viewed as an exercise in creative chemical theory to be investigated, but as is, it's a fever dream