I've seen the Thunderbirds do that maneuver so many times over the past several decades without issue. The solo is never that close to the diamond, it's always flying on a different line than the diamond - when you see photos of the solo piercing through it always appears smaller than the other four jets. You'd be surprised how many non-aviation folk don't understand that.
This is the kind of video that is perfect to add and share to just about anyone on the dangers of wake turbulence.