Absolutely right. Unfortunately there are good reasons why some denominations are yec. To attempt to indoctrinate kids with secular science views can be catestrophic to religious belief. Despite what Catholics believe, as a large religion who are not YEC, for a number of evangelical denominations, YEC is vitally important for the way the gospel is preached. Take that away and the denominations core beliefs collaps theologically. Many theistic evolutionists simply do not understand how problematic their theology is and so don’t grasp this concept.
One issue is the sanctuary service, another is the 4th commndment (the Seventh Day Sabbath). There are other problems, e.g Noah’s flood and why it happened, and the relationship between sin and death, before sin there was no death. The gospel very clearly teaches salvation from sins and a physical resurrection from the grave for those who have died in Christ and the wicked being thrown into the lake of fire…difficult to reconcile properly any other way.