How does not believing in gods require more faith than belief?I think your question and the claim it makes is a clear case of confusing what things are about.
Sorry to say it so frankly. But, there are some who have clearly demonstrated how atheists need much more faith than believers to hold on to their belief system. If one accepts this, then all of us, in general, atheists, Buddhist, Muslim, person who worships their ancestors, etc. - all are running the same software, the only difference is their target of their devotion. Of course, some people devote exclusive devotion to mammon; these may not care about the side issues much. Others, live to satisfy their human desires, and that is their focus.
But, the software is the same. The devotion is as intense. The focus is different, and that is all.
Moreover, believers have extensive scripture with massive
detail to believe as inerrant truth.
It's rather like saying that sitting in me green chair blathering
on the internet takes more athleticism than running a marathon.
Another annoying simile....
Tis like saying that denying the existence of Santa Claus, the
Tooth Fairy, Mother Goose, & Cthulu takes great faith.