Maybe not in the USA, but in Europe it was! Since the British developed Pale Malt (before pale malt was air dried malt which tasted grassy) 300 years ago, modern beer was born. With that came porters, pale ale, lager etc. Complex beers were in abundance - when the British developed Russian Imperial Stout they weren't doing it because it was simple! And mouthfeel? Of course they worried about that. The industrial revolution started mass brewing so major brewers were competing for sales.Well, heck, "our ancestors" from just 50 years ago likely didn't care about any of that either.
Beer was functional and likely wholly unexciting. Not something I care to emulate...
Cheers!
You do realise that dry hopping, hazy beer, and speciality grains like Crystal and the use of oats in beer are also hundreds of years old?