It's obviously Shamrock who met with the Gorosei, not Shanks. It's just a dumb theory at this point
Idk what's up with Shanks and the government, but I don't think its a Doffy situation, Shanks never chose to leave, nor did anyone in his family. He was technically kidnapped(though unintentionally), so who knows what his standing is. I assume his family may be impressed with his strength, but they think he's completely misguided and corrupted, while maybe the Figarland are facing ostracization for one of their own leaving Mariejois