You brought up a good point on this person deleted his podcast once he started working at a FAANG. When you worked for nobody, not many cared. A publicly traded company garners creates attention, whether malicious or not. It's safer to say nothing in public unless you are authorized to speak in a conference, to communicate with stockholders etc.

(If someone knows the URL of the podcast, they may still able to locate the podcast from Wayback machine. The episodes may not be completely gone, but they are way harder to find because such steps involves knowing you in the long term.)