Honestly, we don’t think best before dates help beer drinkers very much as beer isn’t fine one day and then bad the next!
In fact many beers continue to develop in the bottle and can be cellared in exactly the same way as wine (which bizarrely isn’t required to have best before dates!) - we regularly drink beer past it's best before date on purpose!
Some beers also display a bottled on date, so it's easy to get confused.
In short drinking beer that is past its best before date won’t do you any harm and can be a perfectly enjoyable experience.