I have no issue adding my own larger drive, but external hard drives you only get with SATA drives and not the super fast nvme's unless you are willing to spend a limb!
I would have rather the storage space be increased here with the cost of the console remaining relatively the same, especially considering the majority of money is made from the add ons (like the games, gamepass etc) and the consoles themselves have very fine margins
You could use DAS box with a pair of 3.5” drives over USB 3.1