It's a joining process - not just a cutting process like the straw you tried to splice into the discussion:
Splicing molecules into an existing polymere, as exciting as that might be, does not manifest the sort of sustained, COMPLETE, self-replication that might demonstrate the process of evolutionary abiogenesis.
“It’s a joining process - not just a cutting process like the straw you tried to splice into the discussion:”
You still do not understand the chemistry. A base is added.
Splicing film does not add a frame.
Splicing rope, in your example, loses rope. Splicing wood, your other example, does not add more wood.
In this reaction more RNA is added.
Also you do not understand this is an excision event.
The analogy to film is good.
A film may have some frames cut out. Two cuts are made, then the intervening film frames are removed and the two ends are spliced together.
The film cut out does not gain and added frame. No where in the process is there an added frame.
The RNA example in tetrahymena excision of an intron in a ribosomal RNA transcript is very analogous to the film example above except that there is a base added to the excised piece.
That would be like adding a frame to a movie every time it was spliced.
If this same dynamic existed in film, and one kept splicing a one hour movie, a longer movie witch more frames would be created just by splicing.
One could create a whole new movie that way.