Utter nonsense. Your argument is that because you can imagine a god and spread the idea they are real. The logical conclusion there is that anything you can imagine is equally real. Bigfoot really is wandering around a forest, spaghetti absolutely does grow in trees, and the moon landing was definitely on a sound stage (but they also really landed on the moon because I can picture that too).
UK is under BST (UTC+1) for half the year but people are usually just taught that the UK is GMT (UTC+0) which is based in the time in Greenwich, withought mentioning DST. I suppose it’s also possible everyone is taught BST and just forgets about it because daylight savings sucks, but either way most people seem to think GMT and UK time are the same thing.
This means you’ll get people asking for GMT times when they want BST or UK local time.