They are fast, ubiquitous, 0-dependencies, short, espressive... most of the time. The fact is that we don't have anything better to glue commands together (afaik).
Actually, quite the opposite. All that shell scripts do is glue together other programs they depend on.
That makes them not portable. You can't just move a bash script from Linux to macOS because it uses ancient pre-GPLv3 versions of bash and all the other GNU utils.
For scripts where you need something unstandardized, say, imagemagick, you would wind up with up with a dependency in most other languages as well.
Or seconds, after you learn the search term "Perl one-liner" and add it to your queries for all your edge cases.
Start thinking of perl -we as a Bash built-in function.
Suddenly edge cases go from hours to your typing speed into Google.
Don't forget to leave a comment with a link to where you found the solution, what it does according to that site, and an apology for the unreadable line noise. If you make changes to what you copy and paste, explain your changes in a comment.
(Just in case it sounds sarcastic or ironical, this comment is serious and how I really work. I am really glad for my comments whenever I revisit old scripts.)