I do not personally understand these attitudes but the negative feelings are definitely there. My elder daughter's birth was midwife attended in a hospital. You are stuck with the hospital staff. Obviously, if all goes well, you are not expecting to be there long before birth, but there's no way to predict this, especially if, say your waters break and labor doesn't start. It's also really hard to tell sometimes how far into labor you are, even with an experienced midwife there.
Many minor interventions happen in hospitals because it's easy and available.
For example, automated blood pressure cuffs. Another example is external fetal monitoring. Furthermore, getting into a car in labor is a miserable experience. There's also dealing with the staff after birth. I greatly preferred my home birth.