[Toymeister]

When bikes stop they lose momentum. On multimodal paths you stop, a lot.

On multimodal paths there are many types of vehicles and walkers which travel at different speeds creating obstacles. Walkers are generally unaware that bikes are behind them no matter how much you signal, speak, or yell. They fail to yeild

Golf carts are unaware of physics, that on four wheels you take corners very slowly and bikes do not. Many golf cart operators are rude and operate their carts in dangerous ways.

Roads do not have tunnels. No tunnels mean you can maintain cadence. Pedal cadence is important to cyclists.

Finally, and some what obvious by now: multimodal paths are dangerous for cyclists. It is legal for cyclists to operate on the road, not so for most golf carts, and not so for walkers when a sidewalk is available.

I hope this answers the question.