In issue #1058 @sky5walk wrote:

Why are all entries returned in double quotes?
"xx"[TAB]"yy"[TAB]"1234"[CR][LF]
Is this to allow a TAB character within the data?
Could you add an option to drop all double quotes and just return contents [TAB] or [Comma] delimited?

I'm trying to mimic the CSV export functionality in a quicker action and on smaller selections.

Ok, let me summarize this way.
Is it risky to follow the cut/paste behavior of MS Excel?
Why add double quotes around each cell's contents?

@mgrojo already answered that it does seem we're using this to differentiate between NULL values and empty strings or something similar. Because I don't have any idea either I'll try to figure out why we're doing this and if we can change it 😄