Have a flawless design. Information architecture comes into play here, as it’s important for a landing page to have a clear, crisp design that leaves all questions answered without inspiring any new ones. Navigation should be obvious and simple, all required information should be provided, and nothing should come between the visitor and the conversion (aka no pop ups!) If at all possible, visitors should be able to convert in one click. Let every additional click weigh on your conscience like a heart beating beneath a floorboard.
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.