not making such claims is a the only way to be taken seriously by the community it serves. Those using tor-browser know it's a best effort approach.

The same attitude should be expected from all InfoSek vendors. But it's easier to sell a product with claims it will protect you rather than saying the truth (that it's riddled with edge-cases like everything else).

Tor, unlike many of the VPN companies, thankfully lack a marketing department trying to push it with incorrect claims about its alleged ability.

edit: if the threat model is to protect against corporate mass-surveillance ("the big guys"), then Tor is incredibly effective. They wouldn't go through the trouble to identify and blacklist exit nodes and present users with a captcha otherwise. (ofc assuming that it is used correctly: never log in, or if you must only log-in with sock-puppet identities etc).