Curate, connect, and discover
Imagine the reason why Optimus is so focused on Earth isn't because of a noble, sentimental reason... it's because his Prime instincts/the Matrix is literally screaming that the planet is the only cage (blood and bone fueled by the cycle of death of its inhabitants howling, clawing, demanding for the right to exist) that's stopping a fully revived Unicron from consuming all life itself
There's no way he can realistically explain this is his faction or to any other Cybertronian, like who the hell would legimately believe that the Unmaker is within a random orangic, thriving planet in tiny pocket of the space-boonies?!