you are saying what you "imagine" would be the case, and I am citing an example of actual experience, where it was a non-issue
but we all know that individual cichlids will behave differently . . . the point should be, every circumstance is unique and the OP won't have an answer until it is tried . . . but size is not determinative
frankly, I have no idea how rough the tilapia mating ritual is, but convicts are very tough little fish . . .