Chrysanthemums

Never grown chrysanthemum so I’m going to ask a stupid question! Sorry   . Why plants? Are plants better than seeds for starting chrysanthemum?

All flowers can be grown from seed, but the named varieties are propagated from cuttings, or possibly the more modern method of cell propagating, it is also easier to look after  rooted cuttings than seedlings and of course there are set dates for disbudding to give what might be called show quality flower heads, it also takes 4 months to get flowers from seed, which may mean a short flowering season, as there could be frost here in September, but of course no question is stupid and I just hope I haven't given you a stupid answer