This is correct isn't it? You can't just say vaccines don't prevent you from getting COVID because they do. A guy who works for me is still only has his first vaccination. Him and his finance flew out Alberta to help move his sister back and somewhere along the way, she picked up the delta variant. They drove his sisters car home back to Ontario, spending 24 hours together (mostly in a car) for days on end and that one dose prevented him from getting COVID. He lives with her and has been caring for her as she's been in and out of hospital and they test him like weekly and he still doesn't have it. Pretty incredible. The vaccines aren't 100% effective (none are - the flu vaccine is only about 60% effective), but they do wonders.
Outbreaks like the Yankees just had are likely to pop up from time to time for the foreseeable future. This is likely something we're going to have to get used to. No different then it will happen in work places and other communities. The most people that get double vaccinated, the fewer outbreaks and the less stress on our health care systems. The evidence is pretty clear.