I would encourage you to at least try it first. Don't let someone else discourage you before you even start. And start with something small, so you can build your skills. Once you have a couple of smaller projects under your belt, gradually move up to larger projects.
I will say that I started out by rolling my quilt up to fit it in the harp, but I really struggled with it, so I quit rolling it and started accordion-folding it instead. Worked much better for me.