Re-target website visitors who don't convert the first time. You won't be able to capture lead information for all of your website visitors, but that doesn't mean you should give up on the visitors who don't convert. Consider running a retargeting campaign so you can display advertisements on popular websites which will display only to people who visited your website. This will give you another chance to draw them back in.
There’s a better solution: Build out an automated email follow-up campaign that speaks directly to this objection. Any time you encounter this problem, you can send that prospect information that seems designed just for them. A multi-month educational campaign may reduce their content anxiety and nurture them toward a sale. Yes, it’s work up front, but once finished, this campaign will work for you always.