The main question is whether the examples are worth the space.
I think the answer is mostly "No". In my courses, I ask people to read the string docs to become familiar with the methods. What I've learned is a) the docs are clear enough without having an example, and b) it already is too long and tedious to read.
IMO, a well-intended effort to add examples would be counter-productive and make the docs less useful. Also, it is already trivially easy to run experiments to verify understanding (the string methods require almost no setup to try out).
FWIW, the argparse docs are a example (no pun intended) of the consequences of going overboard with examples. Instead of one or two informative examples for the whole module, they are were added at a fine-grained level. As a result, we almost never can get anyone to read the docs top to bottom to gain a full understanding of the module.