There are internal functions such as punsafeCoerce, punsafeConstant etc. that give you terms without their specific type. These should not be used by Plutarch users. It is the duty of the user of these unsafe functions to get the type right - and it is very easy to get the type wrong. You can easily make the type system believe you're creating a Term s PInteger, when in reality, you created a function.
Things will go very wrong during script evaluation if you do that kind of thing.
The good thing is that unsafe functions all have explicit indicators through the names, as long as you don't use any punsafe* functions - you should be fine!
Of course, these have legitimate use cases. Most often, we use these functions to convert between types that truly have the same internal representation in UPLC - but the type system simply isn't expressive enough to infer that.