It's on the edge. I do very occasionally "scant" being used this way by natives. However, I usually only see it used like this in books that are more than 100 years old, and even those books would be more likely to use "scanty" instead of "scant" ("scanty", though, has almost completely disappeared from most modern varieties of English). So, when do we use "scant" in typical modern English? In one of 2 situations: 1) in front of uncountable nouns, especially when they are abstract: "He paid scant attention to the teacher" "There was scant evidence that Bob had committed the crime" "This news story has received scant coverage." Note that it is possible to use "scant" uncountably, so an acceptable version of your sentence could be "He has scant vision concerning this topic". 2) Alternatively, you can use the structure "a scant [measurement] [plural noun]" "A scant 5% of people approved of the politician's speech." "Bob usually runs 15 kilometers every day, but today he ran a scant three [kilometers]." "Sam added a scant two teaspoons of sugar to the recipe."

scant - insufficient are interchangeable or not?