lead ballast vs iron/cement
While ranting about how much you hate encapsulated keels(and Idon''t even think that was the question)you forgot to mention that with crap cement/iron ballast, the center of gravity is much higher which further screws-up things.
My boat(an Endeavour 32)which draws 4''2" has an encapsulated keel would be a breeze to repair. Because she is not a deep draft keel(like mabey a Pearson Vanguard?)and she does have many layers of fiberglass sealing off and holding the ballast in place in case of an under the surface collision.
Bolt-on keels can be very strong IF desined and built properly but the problem IS is that they rarley are.