Show me the account of the person who gave merit to their alt and, in the meantime, told everyone that it was his alternate account.

Everyone probably understands this. Someone who passes merit to their alt is unlikely to admit to managing two or more accounts. And it immediately becomes clear that a person is lying for some personal purpose.

Your example is a completely different case. I think that Philipma1957 is often in different places, but because of his love of the forum, he tries to always be in touch with different devices. For me, this is normal. I don't see a problem here.