I don't think its necessary to prove anything he says, the keyword is 'could'. We don't know, and people who actually do don't spill it on HN just because we would like them to.

These are generic statements about cult-like leaders, Musk is a prime example. Its hard won affection, not just smooth BS, we here all know that.

That being said, people generally don't change, just situations (barring some catastrophic accidents or similar). Whatever actions given person did in the past describe them well enough in present. Again, generic but IMHO always valid so far.