Races do not exist biologically[0][1], but they do 'exist' as a social construct[2][3][4]. And I second your second sentence :)
[0] https://www.youtube.com/watch?v=ZrKrGkgeww4&index=4&list=PLy...
[1] https://www.scientificamerican.com/article/race-is-a-social-...
[2] https://en.wikipedia.org/wiki/Social_constructionism
[3] https://www.theatlantic.com/national/archive/2013/05/what-we...
[4] https://www.psychologytoday.com/us/blog/without-prejudice/20...