Yeah I do agree with this concern. That's why I added the addendum at the bottom of my comment, though I might have been adding it at the same time you were typing your reply.

Just starving yourself is not a good strategy for health or weight loss. You won't maintain a starvation diet forever and when you stop you'll go right back to your old habits and weight. A caloric weight loss plan should absolutely assume that workouts will be the primary driver of the calorie deficit (And it's actually not hard, even for someone of weak will like me, to do that: One workout = One free meal!). That's why the tool I linked needs to know your workout routine. In fact if I would change anything with that tool I would add the option to replace the workouts drop-down with a custom workout deficit amount because "1-3 workouts / week" is too vague, everyone's workouts are different.