ok sorry I made it sound like this, that was lack of my knowledge about security.
My advice is find someone who has experience with Enterprise sales and ask for a chat. I think it might be very hard to sell this kind of solution while bootstrapping, maybe it would be easier to raise money and find a sales experienced cofounder. But I don't have experience with Enterprise sales
Actually, RBI (remote browser isolation // cloud based internet isolation) is a big industry. Menlo Security, Symantec, WebGap, Light Point, By Light, and more, have products in this space.
It's not really a question of "does the market exist? Does it have a usecase?" and more of "How to find customers with this need? How to approach and sell them?"
Granted, it is a niche so I get if you don't know it at first glance.