I'm a coder and I still find the ability to eyeball a file useful, also csv can be munged about with the shell easily (cut, grep, sed etc) which can be surprisingly useful.

Or Miller: https://github.com/johnkerl/miller

csv can also be queried by tools like q[1] if sed, grep, etc. are not quite up to the task.

I find this very useful to quickly summarize, filter, reorder/rename columns etc. in csv files.

[1] https://harelba.github.io/q/

...or even, in most cases, Notepad.