A burger isn’t very valuable to a vegan. And even a veggie burger won’t be persuasive to them if they’re not hungry. And even if they are hungry, they might be loyal to a specific brand of vegan burger. What you think is valuable may not be to your audience, and even if it is valuable, you may have to persuade them with good enough reasons for them to switch brands in favor of your offering. You’ve got to a) offer what’s valuable to your target in their world, and what they’re ‘ready’ for, and b) learn to do it with persuasive language that moves them.