It's not just Barbarians. It's the entire concept that Strength is the most important combat stat.
WotC is following the general trend where people prefer playing moody snowflakes than people that actually look the part, and aren't spectacular in other areas like looks and wit as a result.
Keanu Reeves instead of Arnold Schwarzenegger. Also "girl power" - people don't want to sacrifice fashion and beauty just to be able to wield a big-ass sword (in either sex). In fact it's even unacceptable to point out gender still exists.
The idea you need to compromise on beauty and smarts to create a fearsome warrior is truly dead
It's only within the Sword & Sorcery subgenre the hope of games where reality still is given a token nod when it comes to the physicality needed for martial combat.
And as I said it's not just Barbarians. It's Dwarves too. For precisely the same reasons.
It's Fighters in general. If you can use magic to explain why you don't need to look like John Cena to be a killer, well, then people prefer to look like Hit-Girl (Chloë Grace Moretz) or maybe Harley Quinn (Margot Robbie), or say a gnome barbarian to take a memeable fantasy example.
Just take Red Sonja as an example. Yes if you get to cheat and put 18 in every stat, so you get to have big strength without bulging muscle, and get to have a feminine look with big breasts at the same time, why not?
But if you prefer having the choice of fantasy gaming where you can choose a game where you basically need to be a male muscle mountain (or a Gimli, or, to be honest, an Orc) if you want to excel at killing people with a heavy object, you basically have zero choice in gaming product published this millenium.
So, yes, I very much see your point. Let's hope this current climate blows over and featuring realistic constraints on body type and mass, even in games with Dragons and Dungeons, once more becomes less utterly unacceptable! [emoji106]