We can also live just fine without an appendix. Literally the only thing the organ can do is suddenly develop a severe infection and kill you without surgery which has only become reliably available in the past 100 years or so. (Blah blah bacterial reservoir or whatever: that's of evidently very low value compared to sudden and painful death)

There's also no reason we shouldn't be immune to funnel web poison: cats make an enzyme which deactivates it, whereas primates don't.