It doesn't, but getting regular folks to use it at home is how they become known enough to get recommended for businesses. They have a post specifically about this: https://tailscale.com/blog/free-plan/ "Rather, increased word-of-mouth from free plans sells the more valuable corporate plans"

And it 100% works. We're in the middle of rolling out Tailscale at our company because I and other people here had tried it personally for non-business use cases. FWIW this is also the path we took for the Outlook iOS/Android apps in the early days (and pre-Microsoft acquisition). Let people learn to love it, and then they'll want to bring it to their jobs.

Why does your business need to get involved? You're allowed a personal VPN too if you want one

Uhm I need this when I’m on holiday and want to do some Minecraft with my son in worlds that run on my server at home… Although vanilla WireGuard works well for that already.

A company like Tailscale has multiple audiences, your company being only one of them.

Why does Google require Google Duo when all you need is Google Search?