My sense is that your compent-incompetent therapist ratio should be flipped -- 75% are incompetent . And even that might be too generous.

And if competence is defined by things such as solid grasp of psych theory, ability to run a practice smoothly, sufficient clinical experience, sufficient psychological and emotional health, sufficient self awareness... then i guess that means ability on the level of first do no harm. Within that group, the subset of therapists who possess some ability to actually help clients, in a significant and lasting way and with regularity, would seem to be relatively small. Starts to sound like a lottery.