Sub 1600 level:
a3: True that the line with 2. ...Nc6 doesn't do well for black but after most of the other common moves black is doing fine. After g6, black is winning most of the time.
Morra Gambit: The most popular move after 1. e4 c5 2. d4 cxd4 is 3. Qxd4 and then black wins most of the time.
Wing Gambit: It doesn't lead to a lost position on move 10. This is the line I found on lichess amateur database.
And black is doing fine or better.
Alapin: On move 7, black is not hanging piece.
This isn't the best for black and white is better here but there is no piece hanging. With d5 and Nf6 lines, black is winning most of the time.
And what was your point in invoking the Lichess database if it doesn't actually support your point?
Here was my point:
It's not specific to the sicilian, but the sicilian is the worst example by far.
There are a million sidelines that white could use before they even enter the najdorf: GPA, 3.Bb5+, closed sicilian, morra gambit, wing gambit, alapin, delayed wing gambit, delayed alapin, 2.a3, 2.Be2, 4.Qxd4 etc.
Almost all of these have 1 thing in common: if black plays all the most natural moves at amateur level he is either much worse or losing straight out of the opening.
So let's take a look at the stats:
at the sub-1600 level on lichess, following all the most common moves for black:
2.a3 sicilian leads to completely lost position for black before move 10 (2.a3 Nc6 3.b4 cxd4 4.axb4 Nxb4 5.c3 Nc6 6.d4 d5 7.exd5 Qxd5 8.Na3 e5 9.Nb5)
Morra gambit leads to forced mate on move 9(!) - (2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 Nf6 7.e5 dxe5 8.Qxd8 Nxd8 9.Nb5 Kd7)
Wing gambit leads to completely lost position for black by move 10 (2.b4 cxb4 3.a3 bxa3 4.Nxa3 Nc6 5.d4 e6 6.d5 exd5 7.exd5 Ne5 8.d6)
Alapin leads to black hanging a piece on move 7 (2.c3 Nc6 3. d4 cxd4 4.cxd4 e6 5.d5 exd5 6.exd5 Ne5 7.Qe2 d6)
Of course, black could easily avoid these by preparing a line against each of white's tricky sidelines, so, I will reiterate:
IMO, sicilian players at the lower levels need to choose between spending twice as much time as their peers sudying openings (to learn a line against all of white's sidelines) or they can play without theory and should be ready to lose lots of games where their opponents didn't even have to think for themselves the whole game and just 'rinsed and repeated' the same trap they have used 100 times.
A scandinavian or modern defense player could probably play 1000 games and never lose like that once, but it happens all the time in the Sicilian, even at my level.