Remember that both prayer and meditation mean very different things to different people. I used to be quick to dismiss prayer until I talked to more people about it and found that what they were doing was quite similar to my meditation habits.
The reason I dislike christian prayer tied with self reflection is you gauge your behavior to such an outdated code of morals with contemporary values. Ultimately it causes you to criticize yourself in unhealthy ways. Especially when it leads down the rabbit hole of ultra-conservativism where you think since you aren't practicing it perfectly, you need to double down and do it more and more according to scripture. This is why radicalism occurs and causes nut jobs to shoot an abortion clinic or blow themselves up.