Yep.... Even if you are Catholic, try moving or switching parishes and feeling welcomed at a new parish. There is actually nothing to prevent a non-Catholic from attending a Catholic Mass. The only thing you wouldn’t be able to do is receive Communion.
One of the most telling stories that came out lately is one about Catholics deciding to return to the Church because of the new pope. The first reaction was that they would totally just leave again when the Church didn’t suddenly approve abortion or gay marriage. And some may do just that. But it is just telling that this was the first reaction to that story rather than isn’t that a nice trend. There are actually quite a few more morally conservative individuals like myself who have just had poor experience with the Church growing up.
Why not?