Why is it useful to have stochastic models for interest rates and the bond prices?

a$.$ Yield curves can be forecasted$/$ estimated with only using the short term spot rates.

b$.$ Using dynamic models one would be able to use probabilistic insights for risk management.

c$.$ These models could be used for forecasting bond prices.

d$.$ Some derivative products $($e$.$g$.$ options$)$ are priced along with these models.

e$.$ All of the above is true.

f$.$ There are no real bonds on the market, which are traded continuously, meaning that these models only have theoretical significance.