I don't personally know any vegetarian or vegan who thinks of alternatives as some kind of healthy choice by default. Many of them also don't consider cow's milk to be inherently healthy, but that's neither here nor there.
Those who care about eating healthy make sure that non-healthy foods, animal product alternatives or otherwise, are not the only thing they consume. They get their protein (and other macro and micronutrients) from relevant plant-based sources or supplementation. The latter is especially common for gym-goers. I'd hope people who do consume meat and dairy and care about their health also don't assume that animal product consumption is equatable to a healthy holistic diet by default.
Those who care about eating healthy make sure that non-healthy foods, animal product alternatives or otherwise, are not the only thing they consume. They get their protein (and other macro and micronutrients) from relevant plant-based sources or supplementation. The latter is especially common for gym-goers. I'd hope people who do consume meat and dairy and care about their health also don't assume that animal product consumption is equatable to a healthy holistic diet by default.