I didn't know Shortcuts were powerful enough to pull images of specific sizes from webpages. That's really useful.
Creating a Shortcut to scrape these guitar tabs doesn't seem that different from writing a Bash script that does the same thing.
The main issue is that most users would grab the Shortcut from the gallery, find the guitar tabs they need, and never know where it came from.
Maybe Apple could automatically provide attribution in their Gallery? Like "This shortcut is powered by Google.com and JGuitar.com".