Limited imagination, couldn't figure it out.
Of course, he still maintained the appearance of a human farmer, and told the End Mages that they must not reveal his true identity in Stardew Valley.
Although some people in Stardew Valley have already guessed that he is not just an ordinary Deity or Demigod, as long as he doesn't admit it, he can shirk responsibility.
After all, the last time his true form appeared, it was when he was fighting with other Creator Gods in the Mage Nation, and his image was widely circulated online at that time, so a comparison would reveal that his personality, state, and most importantly, his appearance, were completely different from now.
You say that was me? That's pure slander, alright.
"Also, regarding construction issues, when you are trying to create new worlds, you can also purchase any creation materials from me; I have everything here, and those Deities and God always add some special materials to the universe's underlying resource pool."