No, not at all. There are some breeds I would suggest that a beginner in particular should look at, like QHs (yes I know they're not all quiet dead-heads, but many are. The safest, most reliable horse I've ever known was a QH and years later I'm still singing his praises!) but none that I would rule out. I laugh when I see ads that say things like 'no TBs!' because god, have I known some Thoroughbred slugs, lol.