That sounds pretty accurate. Anyone who's gone through some econometric classes would know that split testing is (almost) the only way to get to (close to) causality - all the rest is black magic called correlation which can also lead you to the conclusion that Nicolas Cage's movies lead to people drowning:
https://www.thenationalnews.com/uae/nicolas-cage-movies-link....
https://www.wnycstudios.org/podcasts/otm/articles/spurious-c...