Most serious weightlifters in my experience supplement their diet with protein shakes or similar, many vegan formulations exist. It's not super tasty, but I wouldn't call it "highly impractical".
Beyond that in my experience "lifter diet" is not exactly gourmet stuff, unless you really, really like chicken breasts.
I drink about 2-3 day. It leaves anywhere between 2-3.5k calories of real food to fill. It is highly impractical compared to brown rice, chicken and veggies, which is one of the reasons why they will be about the last population segment to ever adopt a diet without meat.
Beyond that in my experience "lifter diet" is not exactly gourmet stuff, unless you really, really like chicken breasts.