No they aren't, as @chloyster@beehaw.org explained.

But I wanted to point a tangent, from the article you linked:

outstretched middle, ring, and pinky fingers to represent a Roman numeral “3.”

Coincidentally, the Romans would count like 👍👉👌... instead of "thumb, index, middle" for the numeral "3", because that resembled the letters "IV", which were the first two letters of "IVPITER", or "Jupiter", formerly known as "Zeus", the God of Gods, and making the "IV" sign in vain was considered a blasphemy... similar to how Jewish people wouldn't "use the name of God in vain", which lead to the expression "hallelujah" from "hallelu-Yah***", meaning "praise Yah***"... in order to also not say the whole name of God. Curiously, Muslim people have no problem with saying "Allah" or writing "ﷲ", just with depictions of their prophet, go figure.

These sign shenanigans have been going on for thousands of years, only difference is now a "meme" with 10 comments on 4chan, can become a hate sign used by thousands or millions in less than a decade.

PS: another curious one, is the ✋ "Hi!" vs. the Greek 🖐 "I smear 💩 on your face"... best not to confuse them 😉 ("oops, got something in my eye" /s)