“Both 2...Nf6 and 2...d5 are fine against the Alapin, and some players may also like 2...e6 or 2...g6.“ - IM pfren (September 4, 2018)
https://www.chess.com/forum/view/chess-openings/a-bust-to-the-sicilian-defense?page=6
2...Nf6 is not so fine, as white has 3. e4-e5!, gaining tempo.
Why give away a free tempo?
"... There is no doubt in my mind that if you really want to test the Sicilian then you have to play the main lines of the Open Sicilian. The problem is that there are just so many of them ... and keeping up with developments in all of them is a substantial task. ... as you become older, with other demands on your time (family, job, etc.) then it becomes more and more difficult to keep up with everything. At this stage it may make sense to reduce your theoretical overhead by adopting one of the 'lesser' lines against the Sicilian: 2 c3, or the Closed Sicilian, or lines with Bb5. ..." - GM John Nunn in part of a 2005 book where he discussed a 1994 game in which he had played 2 c3.
The Closed Sicilian allows 1. e4 c5 2. Nc3?! e5!, binding the d4-square, and Black is nominally better.
As for the Alapin, after 1. e4 c5 2. c3?! d5! 3. exd5 Qxd5, the c3-pawn takes up the square, where now a white knight from b1 can't land to drive away the queen.
Black is more than comfortable, playing Black.
Nuances, so to say, I learned all that when I reached 3100, lo-ool.