That is an over-simplification.I find them correct. In these cases you can use the definite article "the", you don't use it with "church, school" (to go to church/ school) and "home" (to go home)
I would like to see Yuukan post sentences with comments that explain the question.Hi Panjandrum! Would you provide us some examples in which we cannot use the article?
With a little bit of additional comment ......
Well I am going to the church we saw last week to see if...... (singular incident)
I am going to church (like I do every day) .... (regular / habitual)
Where 'go to' means 'attend', you don't use it, where it means the literal action, maybe a one-off, then you can..