I’d rather have it and not need it than need it and not have it.
I usually try to keep the characters close to the author’s vision (unless it’s an unnamed You-insert character, in which case I create someone using whatever features I’m in the mood for), but I like to have the option to get rid of features I find distracting.
For instance, I will always change the “Medium waves Natural” hairstyle when a character has it, because I can never take my eyes off of how low the hairline is during the story. Some authors give their characters ashy lips, and I like being able to change that. Or sometimes, especially with stories that have multiple male LIs, the dudes look the exact freaking same. Like you can tell the author had a favorite nose and eye shape. Two male characters with Grecian narrow noses, chiseled shaved faces, downturned lidded eyes, and medium lips. The only difference is one has blond wavy taper hair, and one has brunette side curls. This happens way too often, and I like to make them look somewhat less like clones given the chance.