It’s the lack of teaching in the form of discipline from bishops and the vatican.
My belief is based on my God-given ability to reason.
Though I attended twelve plus years of Catholic schooling, I don't rely on the bishops of the church to tell me how and what I should think.
That the church did not defrock every bishop who abetted and covered up for sexual abuse speaks volumes. Has every priest found guilty of sexual abuse been thrown out of the priesthood.
If not, why not?
I, as one of the laity, have not or would not sink to that depth. I'll rely on my own conscience; the church has to find honesty.