Considering that's a 30-year-old practice, it would be prudent to ask if it’s still relevant today—or if a better way exists. Aviation is constantly progressing, which can make decades-old practices potentially irrelevant.
Whilst I agree with the sentiment of continually checking whether what we do is still valid, just because something is decades-old does not imply irrelevance. I would argue that, given the rapid increase in reliability of aircraft engines, that an emergency briefing is more relevant today than it was decades ago where a pilot could reasonably expect to have an engine failure (or other system malfunction) at least a few times in a career. Perhaps I'm biased watching Juan Brown talk about different Loss of Control events around the industry, but it does seem that we have moved away from teaching many of the fundamentals that kept pilots safe for decades, simply because the instructors have never experienced a situation themselves.
Not to get too far away from the argument, but I see this akin to the vaccine argument. A lot of people don't want to vaccinate their children because they don't see the point, or otherwise view it as big-pharma making money. But I wonder how quickly that viewpoint would change were they to see their sick child laying in an iron lung, possibly for the rest of their life. The same goes with any type of emergency talk in aviation - they happen so rarely, that many pilots are too unprepared for when it does, yet the situation may have had a positive outcome had that pilot simply took 30 seconds to think about it.