What assertion? One can cultivate a liking in a mutual hobby in a way that puts the other person off. For example, in political activism (which has been respons

What assertion? One can cultivate a liking in a mutual hobby in a way that puts the other person off. For example, in political activism (which has been responsible for the creation and dissolution of many relationships) even if two people agree on same basic premises, that does not mean they share complementary motivations or standards in such a way that is conducive for one to want a relationship with the other person. And yes, as every human being has led a distinct life there will, more often than not, be differences in expectations and desires between two people and that likely will lead to something going wrong. That disproves the point that simply being in proximity to someone of the same hobby is necessarily an advantage.