Well, these guys finally learned about diversification (risks).

The risk price for storing 6.274
BTC in one wallet is too high.
It seems to me that they could have distributed these 6.274 not only among 14 wallets, but among more. Not only for protection against a quantum computer, but also against theft\hacking, for example. Although there are some difficulties with storing such a large number of seed-phrases (I hope they don't do this on a piece of paper?

).
Considering the future (and current) growth of the value of bitcoin, too much will be accumulated in each individual wallet (6.274/14=448
BTC).