There's nothing wrong with wireguard at all if you already have the hosting service available. The core value add for Tailscale is that they provide/host the service coordinating your wireguard network.
If I'm not mistaken, there's a self-hosted alternative that let's you run the core of Tailscale's service yourself if you're interested in managing wireguard.
If I'm not mistaken, there's a self-hosted alternative that let's you run the core of Tailscale's service yourself if you're interested in managing wireguard.