When 25.000 books, books from the early days, English texts from 1473-1700 become available it is quite something. Many of these text are the earliest sources on many subjects in English.
All of them deserve to be registered in Wikidata, The most relevant question would be: how do we serve our public best. Yes, it starts with indicating that these books exist but it is easy enough to point people in the right direction. The direction where these books can be found to be read.
It seems obvious. When books are (finally) available under a free license, it is important for people to find them.