To sell, you need to speak the language of your target audience.
Pivotal's audience is enterprise customers, so their website is naturally filled with enterprisey messaging - high on 'outcomes' for decision makers and low on nitty gritty details.
HN's audience is not really the same (broadly speaking). A landing page that shows you how simple it is to deploy a python function into production on Pivotal Foundry would probably be a better sell here.