I can certainly see the differnce between hikers and people testing there BOB's.

The longer you are a hiker, the less people seems to carry. ('what can I do without')
The longer you people are building a bob, the bob seems to get bigger. ('what else could be usefull')

As a outdoorsman I find the many bob bags contents on forums and youtube to be rather heavy, bulky and have weird priorities.

I think a plan of just walking to a safe destination with a BOB a bit unpractical. Don't see a lot of scenario's when thats a good idea and you just don't make enough ground fast enough.