Re: ¯\_(ツ)_/¯
This draws attention to another difference between generations of emoji.
The first emoji eg. :¬) could be keyed on a standard ASCII keyboard - AltGr, extended character sets and Unicode came years later.
The Unicode shrug emoji takes advantage of the adoption of Unicode and thus devices having code pages for character sets other than ASCII installed as standard. What I like (sarcasm) is that the easiest way to use the shrug emoji is to either cut-and-paste the text or install ASCIImoji and type (shrug)?
Obviously, to use the pictogram emoji more effort is required.
Aside: Reading the history of the shrug emoji (https://www.theawl.com/2014/05/the-life-and-times-of-%C2%AF_%E3%83%84_%C2%AF/ ), I suspect there has been some licence taken with the truth, so as to create a nice story.
A little understanding of the development of Unicode and the internationalisation of the Internet, OkCupid rejecting it (at the time) is totally understandable and not "almost strange".
You can't directly key this emoji on a US keyboard without knowing your way around the Unicode character maps and how to get non-Japanese Windows to show the Unicode Japanese characters. Which given Caroline Eisenmann's LinkedIn profile doesn't give any indication of her having a working knowledge of Japanese and thus a reason to have this character set readily available...