There’s a reason Geico or Duracell’s websites (both incredibly famous Berkshire companies) don’t look like this. Berkshire is essentially an unorthodox investment fund, all of their websites are pretty sparse

Of course there's a reason, but that doesn't mean there's a good reason. Big commercial websites do not choose their design out of a desire best to serve their customers, but out of a desire best to attract attention and to funnel that attention towards their ends—and what a website most wants us to do is not necessarily what is best for us to do.