False equivalency. The Astros and people violating drug policy should all be accountable for their actions, but none of that has anything to do with Pete Rose.
Gambling is black market, there is no transparency. Pete Rose originally said he didn't bet on sports, then that he bet on sports, but not baseball (still against the rules), then that he bet on baseball, but not games that he was involved in, then games that he was involved in, but never against his team.
The rule is that players and coaches can not participate in para-mutual betting and it's a good rule that he he chose to violate. It's not audit-able and he's burned his credibility to the ground on this subject, so he was banned from baseball for life. Broke my heart, broke my dad's heart. I have no sympathy for him. He is not in any way a victim. There's not "everybody does it anyway on this topic and one of the reasons is because an harsh example is made of the very few people who decided that they were going to do it anyway.