The Odd Logic of a Graduation Address

I saw an online video which featured a graduation speaker in England. He assured his audience that life has no meaning and that whatever it is you do, it isn’t to your credit or blame because that is just how you were made (by evolution and random circumstance).

For some reason, he kept talking.  He had a list of nine things he wanted to say.  

But I stopped watching and listening because I could not figure out why it would possibly matter if I believed him up to that point.