That's a valid concern.
I've also used ZeroTier with good success.
They're a competitor that offers VPN with similar idealized P2P topology. Unlike Tailscale, ZT is not based on wireguard (ZT predates wireguard), but they do offer the option to use their own local auth without reliance/potential issues with yet-another party.
ZT also allows a person to create and use their own relay (called a "moon"), if that's something useful: https://rayriffy.com/garden/zerotier-moon
(For my own little purposes I don't really have a preference between either Zerotier or Tailscale.)
Thanks for the tip! I'll check that out and see if it would work for my VPN needs, but it certainly sounds promising.