question about cold wallets


I recently transferred my Bitcoin to a coldcard.. I am curious to this question as I am still sort of a novice to the Bitcoin world.

What is the actual point of the coldcard itself? Like say I lost the coldcard but I still had my seed phrase and keys... Then how would I regain my Bitcoin without the coldcard itself?

Just kind of confused on why the coldcard or any cold wallet is necessarily when in reality all u need is your phrases and keys?

Can someone help clarify this for me?

Thanks.. I have learned a lot from this sub. Thanks everyone.