Nope. This isn't a migration; it's one-off data population. Fluent Migrator can do that, from its documentation, but it wouldn't be required, and since this isn't a migration, Fluent Migrator doesn't really bring anything to the table that I can see. So you're building a custom software project in your language of choice, with all the overhead that implies. In the workflow I described, you create a file and activate Org-mode. (Or just create a file whose name ends with ".org".)
There's also the documentation task, which has to include the source data and resulting SQL script, as well as the transformation code. I'm not seeing anything here that would simplify that in the slightest; you'd have to either write the HTML document by hand, or write code to generate HTML. In the workflow I described, all that code is already written, and you can invoke it with a single keystroke.
And beyond that, there's the matter of data ingestion. You're starting from CSVs, so you have to read those and parse them just to have the data you need to work with in a form which you can use. Any serious language has a CSV parsing library, of course, so that's not a difficult task in its own right, but it's still more code you have to write, and more effort you have to put in - selecting a CSV parser, adding it to the project, learning its API, et cetera. In the workflow I described, it's a copy-paste operation.
Don't get me wrong - I didn't say, or assume, that anything I described couldn't be done in Visual Studio. But at this point we're talking about, what, a few hours at least? And you're spending a fair chunk of that time on overhead, especially in document generation. You have to find, vet, and install libraries, write or modify a bunch of code, and so forth. By the time you're done, you've probably had to spend the better part of a day on this one task.
In the workflow I described, the only code I needed to write was that in which I expressed the actual transformation from tabular data to SQL statements. Everything else, Emacs and Org-mode took care of for me; all I needed to know was how to invoke capabilities already present. And I had the job done and dusted in less than an hour, with plenty of time left in my day for other work.
That's what I mean when I say Emacs and Vim give you superpowers - not that there's anything you can do in one of those editors that (with enough effort) you can't do in another environment, but that those editors are better than anything else (at least anything else I or anyone I know has ever encountered) at helping you get more done, faster, without having to spend time on ancillaries that distract you from the meat of the task at hand.