Addiction Bree vs Carlos - Someone explain these stories!

I think the writers were a bit reckless with the way they handled addiction. Bree, a housewife who for YEARS had all day to cook, clean, garden AND drink with no one noticing started to mess up but pulled it together when her son was gonna get access to his trust? However, Carlos, who had three people who were completely dependent on him and started drinking heavily for a few weeks needed to go to rehab to overcome his addiction???

Bree started drinking again and having sex with different men every night but never needed rehab? But Carlos did?.... hhmmmm