A Texas seller’s disclosure asks the seller what they know about the condition of the property. It is not an inspection and it is not a warranty. It is a record of what one person will put their name to.
The useful reading is comparative. Put the disclosure beside the inspection report and look for the gaps: anything the inspector found that the seller did not mention is worth a question, and the answer tells you something either about the house or about who you are dealing with.
“Unknown” is a legitimate answer, particularly from an estate or an investor who never lived there. A disclosure full of “unknown” is not a red flag by itself, but it does mean the inspection is carrying more weight than usual.