It is a source, a database of extracted data, thus a secondary source. That said, when there is no connection to a primary source (or digitized version of that source), some of the value of the original source is lost.
I looked at the Connecticut database you cited, and was somewhat surprised that no linked images seem to be in the database. Considering the date of this database (2014) and that is was from an Internet indexing project, I find this surprising, and disappointing.
One of the good points in the old IGI, and some of the other extraction projects, was that the microfilm number was given, which would allow you to go to an image of the original record.
Like you, I also want to know exactly what I'm looking at.