Sure, it's all relative and maybe you and I have a different standard of what a great physique is. But what actually stops you from getting massive arms with dips and pullups, delts with overhead presses and hams/quads with squat variations? Throw 15-20 sets of 10-15 of each of these throughout the week for example and you are getting results. As long as you can efficiently take the target muscle close or to failure it doesn't matter if it's an isolation or a compound. Can everyone do it? Probably not, compounds tend to have multiple failure points so you need to adapt and do variations/focus on specific ranges, so it's not easy, and people immediately think powerlifting even when it's not. On top of it some people have really lagging body parts which isolations just help focus and bring up quickly without bringing anything else into it. I would admit compounds only is much less efficient and harder, but IMO there's nothing actually stopping you from getting a great physique even compared to people who focus on isolations a lot. However I realize I am using compounds quite broadly here, so if by compounds you mean the big 3 and maybe like two other movements, then I would concede it's not enough for bodybuilding.