Why go pin less? I like the fact that the TPM can restrict retry counts and I do not need a rediculously long password. The only thing I do not get is why this

Why go pin less? I like the fact that the TPM can restrict retry counts and I do not need a rediculously long password. The only thing I do not get is why this is not done by a simple SIM card like in any mobile phone. Then one could choose a TPM. Even more: I do not get why I cannot encrypt my android phone with my SIM card.