Did Picasso really exist then? I think all these people who have his paintings are merely being superstitious.
I should be more clear. You mentioned temples and people praying as an indication that god exists - but all you're really seeing there are people's reactions to their own belief in a god; it doesn't prove that any god actually exists, just that there are people who believe he/she/it does. There are countless television shows dedicated to proving that the lochness monster exists, and every year, people journey to Scotland to see for themselves, and there are tourist centers they can visit, books they can buy, and people who claim to have seen the monster to talk to and ask questions; but none of this proves that the lochness monster is
real, just that some people believe in it. That is not convincing enough evidence for a skeptic. Instead, the skeptic looks at the size of the loch, explores how diverse and plentiful the wildlife and plantlife around the loch is, and ultimately determines that no matter what people want to believe, there's just no way that Loch Ness could sustain one Pliosaur, nevermind the many, many Pliosaurs it would take for them to have lived in the loch undisturbed since the time of the dinosaurs. The physical evidence is just not convincing enough.