Well… not never. But it may be possible that inviting people to church is your default approach to evangelism. Since you may not know exactly what to say, you invite them to church. It makes sense that this non-Christian needs to hear about God and what better place than your church. Obviously, your church may plan some special events that are designed to give the gospel but the majority of your church events are aimed at believers. And rightfully so. The church is a group of people who are “called out.” God designed it to be a place where believers gather.
If non-Christians show up, we should definitely do everything we can to serve them in their need of the gospel. Paul indicated that there are times when unbelievers will be with at meetings with believers (1 Corinthians 14:23). But if we limit our evangelism with people who show up at 11:00 am on Sunday morning, we are severely hampering our outreach. The reality is that the average person has no desire to come to your church service. There is little going on that they can relate to.
So, is there value of a non-believer coming to church? Sure. But we want our evangelism to have more depth than merely inviting people to church.