I don't get #3. If I thought there were other belief systems or ideals that were more valid than mine, wouldn't I make them my own? I'm all for respecting other

I don't get #3. If I thought there were other belief systems or ideals that were more valid than mine, wouldn't I make them my own? I'm all for respecting others' beliefs/ideals, but that's not the same as considering them just as (or more) valid.