If they don't whitelist and use the rate at which their own emails end as spam to improve their spam filter, that's great engineering culture.
If they don't whitelist and the emails just land in spam without anyone taking notice, that reminds me more of the well-known slightly satirical image of Microsoft's org chart [1]
Adversarial collaboration is a real thing. Similar to journalism/advertising there aught to be a wall between spam detection and marketing. When any enterprise become large and diverse enough, parts of it will have adversarial postures.
If they don't whitelist and the emails just land in spam without anyone taking notice, that reminds me more of the well-known slightly satirical image of Microsoft's org chart [1]
1: https://bonkersworld.net/organizational-charts