Personally, I don’t think the family ever saw the church activities as potentially suspicious or as a window for an in-person grooming scenario, but the revelations we got over the years do indicate this could be an avenue worth of exploring. Such as:
The Gosdens are church people; they discovered Andrew hadn’t been to school that Friday not by contacting the school, as most assume, but by calling friends from church who either work or have children in the school;
Andrew’s father said Andrew spent one week of his 2007 summer break (therefore, shortly before he went missing) helping his mother run a church program, and that was allegedly over a year after Andrew decided to stop going to church as well – what could have interested him there? The chance to reconnect with someone? Was he pressured by the family to take up this activity again? How could this have played a role in his emotional state?
The father also said Andrew chose to stop going to church after his older sister, Charlotte, argued with her parents because she did not want to go anymore; he brushes it off in the sense of ‘Charlotte was old enough to decide’, but suggests Andrew only stopped going because he wanted to sleep late on the weekend – so, the girl made an informed decision to quit, but Andrew, in his father’s view, just followed along for no legitimate reasons of his own.
I'm not saying the Kevin didn't say everything he can to the police, but publicly, in any interviews he's granted, he's either never pressured any further or willingly avoids going into this topic or REALLY doesn't see it as something relevant to Andrew's choices that eventually led up to his disappearance. My point is that it could be, we don't know.
Why did he really chose to leave? Why did he went back for an entire week of his summer break, despite being given an opportunity to spend a week with his grandmother in London? Why did acquaintances from the church - and not other connections from school - seem to be the entire of his social circle known by his parents? Those are still valid questions.
Edit to include something I forgot: Plus, Kevin also said that, noticing Andrew was more of a 'home bird', he had told his wife 'give it a year, he'll soon be after girls and we won't ever see him in the house'. Their church involvement and the assumption of Andrew's blooming interest in 'girls', added to their posterior pleas to the media in the case Andrew ran away because he was gay and feared he wouldn't be accepted, do make me wonder about the circumstances that only in hindsight the family could see as harmful to their son.