now to answer the question
you will not know in the future what is working or not if and will not have the data to build your pages.
OK, at the moment i have two pages on my sites that are trending at the moment. they dont bring in income but something more important in the SEO game and thats hits and hits add to you position. now the knock on effect is because of that position i get a chance at more income locally. plus it adds to my sales funnel
Just like the platform and device issue you cant put all you hopes in one page one site. by having this network of pages you control your own links in to your main sales pages. so my trending pages can now be linked to a sales page that will get the hits juice for it. without the search keyword data i dont know what the intent is. prospects are not always at first looking for the answer you provide but just options, and then move on the their choice of answer. data is important to you meeting this process.
keyword tools dont work because they are cherry picking whats working worldwide and at the top of the silo or keyword funnel, and its the longtail that more important and can have a cumulative that matches any top ranking keyword. when you up against a top keyword the time spent is much more time than what you can spend on the longtail and your get much better results