We also don't know who CBT works for what it's worth.

It's also fairly limited in suitability (good luck with someone with catatonic depression trying to get them do a hot cross bun), availability (thankfully online therapies are more common now, but it takes 2 mins a day to take a pill and about an hour per week for CBT), affordability (a year of sertraline will cost less than the initial session of session of CBT can).