It's not.Yeah it s an opinion
A color-coded indicator works a whole lot better than an interface that requires a few extra steps of observation for confirmation.
Modern day traffic lights should have taught us that.
Same with how planes and ships have different colored lights on the left and right sides respectively, so you can instantly recognize what side you're facing from afar without the need to "look closer".
Color-coded lighting indicators is a part of human civilization and it's continuously implemented due to it's functionality.
Nothing "personal opinion" about that.
It's possible to beat or be good at a game with bad interface but it doesn't change that the interface are bad.
The familiar's life bar is pretty crystal clear enough.Since you had to constantly look at his interface and dodge especially in Hell and hell mode, you would have preferred a glowing on him that tell you how his familiar life is going?
It's something you can confirm with a glance.