But there are ways to mitigate the bootstrapping issue to some degree.
And PoW chains tend to have a low cost at the beginning making them similar not easy to bootstrap safely (through more easy then PoS).
In the end I don't think what theoretically is better matters, what only really matters is what practically matters for big crypto currencies (and smaller ones can during bootstrap (and potentially later one) interlink with the large chains).
Not "unsafe standard" but
"dangers/unsafe to bootstrap".
But there are ways to mitigate the bootstrapping issue to some degree.
And PoW chains tend to have a low cost at the beginning making them similar not easy to bootstrap safely (through more easy then PoS).
In the end I don't think what theoretically is better matters, what only really matters is what practically matters for big crypto currencies (and smaller ones can during bootstrap (and potentially later one) interlink with the large chains).