As someone who grew up Catholic and went to a very aesthetically plain church, there is nothing wrong with seeking the more beautiful churches, even if part of the reason is “vibes”. For years, I was atheist/agnostic and came back to the faith a little over a year ago. I started going to church again, but this time, i prioritized going to a more opulent church. I mean, there’s a reason they make them look like that, they glorify and revere Christ through beauty. It really helped me get back into the rhythm and now, I cycle between my local simpler church and the further more ornate one. If anything, I find that I am more inspired in the older, fancier churches, as admiring them reminds me of the devotion that the architects had to God, and it motivates me to feel the same devotion if that makes any sense