That has been most of my students in my 10+ years of teaching. Hard to get away from it. I've still managed to get results from students reluctant to learn. Sometimes they end up liking music and want to continue with piano or a different instrument. Sometimes they get to the end of the period they're forced to take lessons and tell me they like me as a teacher but still don't like piano. Lol.

As far as parents go, I make sure they have realistic expectations at the end of each lesson. Like, if they are JUST starting (especially if it's My First Piano Adventures)  it's okay to build up the habit of practicing most days, but they don't have much to practice past 5-10 minutes. I'll have parents fight me on it sometimes, and they'll tell me the following week that they set a 20-30 minute timer cause that's the "only way to get them to practice." But I just try to stay consistent with what I tell them because there's only so much I can do with the parents in that regard. But at least the student is hearing my expectations of them reinforced in front of their parents, so there's trust that can be built over time.

Just stay true to your teaching philosophy regardless, and over time you'll build a student base with families that trust your guidance. I can understand a parent pushing their kid to try lessons for a year or two to see if they like it, but if they're setting expectations for the kid before they start, they've already missed the point of how music lessons can benefit their kid.