SLS might be less safe than some hypothetical future version of starship, but in reality the current starship's most recent flight had a 15 minute window where a no-go for orbit was called and the mission plan would have resulted in a loss of crew. Safe crewed launches and earth landings are not a priority for them and likely won't be for a long time. Even then, SLS+Orion have the advantage of an LES and the option for unpowered landings essentially anywhere, both of which are fundamentally unworkable with starship's design.