The advice to ignore these marks based on the "first edition" is not well-founded. These marks are present in the autograph. The situation with Chopin is usually quite complex as he was selling his works simultaneously to multiple publishers.
Let's look at how a couple of well-regarded editions handled them.
The Paderewski edition reproduced them in the text. From the critical commentary:
In MS the last three octaves in the treble, as well as in the bass,
are marked by small oblique lines pointing downwards in the treble,
upwards in the bass. This signifies that these octaves should be
played as arpeggios, in the same way as the preceding octaves, but
more rapidly. FE, GE, and EE do not have these arpeggio signs which
are, in fact, no longer used.
FE, GE, EE refer to the French, German, and English editions by Schlesinger, Breitkopf and Härtel, and Wessel respectively.
The Henle edition chooses not to reproduce the marks. It says nothing about them in the critical commentary, but adds a footnote on the relevant page of the score giving the notation and saying:
A: Probably an abbreviation for the continuation of the appoggiaturas
in this measure.
Here A stands for autograph.
Wiener Urtext also reproduces the marks and offers comments on the interpretation, but I don't have access to this edition at the moment.