You're also right that some fraction wouldn't be contacting asking for information if the information was more readily available.
They're not shitting on customers and abdicating responsibility for making a better website. They're pointing out something important and unintuitive.
I don't know how to bridge a conversational gap like this because it really is something to experience. Another form of it is job applications. At least 1/3 is just random people.
To try to show some humility beyond "bro u ever done this???":
- My mentally disabled sister, tested at 4th grade level at her peak, and would often spend days applying for random jobs that sounded cool. I'm not talking like "oh Dairy Queen cashier.", I mean, director/CXO etc.
- At my first company, we'd get a contact every 3-6 months, with demo-like questions from the same person. We were small enough that we couldn't chase every lead, made enough money we didn't have to, and I didn't like encouraging active salesmanship. After a couple years, someone followed up asking what his business was like. It was an 11 year old using a point of sale app to get drink orders from his friends from the family pool.