Tiffany, there might be even more important reasons to purchase cuttings rather than plants, well several reasons really.
Seeds won't always germinate. Sometimes its the age of the seeds but it can be because the plant that produced the seed-pods was young and for some reason, those seeds don't seem to germinate. Thus, you might wait around for 4-8 wks., waiting for germination, and nothing happens. If it is the right time of the year, rooting cuttings is more predictable. If you do grow from seed, the rule of thumb as I understand it is that it will take an average of three years to bloom. Cuttings, being mature, can bloom even while they are rooting. The third reason is that seeds don't bloom true to their seed-pod parent. You absolutely will never know what the flower form, size, color, or fragrance will be. With rooted cuttings, the flowers will always be true to that "mother" plant.