So many reasons.
Nobody “owes” anyone an apology, and people who demand apologies are the worst.
In its heyday, the PEDs that so many people were taking weren’t against MLB rules. Sammy was caught up in using substances that weren’t terribly different than substances used for decades. Nobody bags on Hank Aaron for popping whatever he popped. Nobody demanded an apology from him to hang out in Atlanta.
Baseball is the greatest sport, but the game has never had the “integrity” that a lot of people drool over. Liars and cheaters are older than the game itself.