If it's ceiling to the attic, i would do as recommended, sand it down, skim etc. Dealing with vapour barrier repair, insulation falling off, etc... no thank you

If it's elsewhere, i'd remove it entirely and start new. Especially if "paneling" esthetic finish of drywall is a trend that fits you, the job can be done so quick, no tape and mud. A bite more expensive, but so much less labour and (imo) beautiful result.