Some people here are defending Mullvad's political position. But the point is that a project devoted to free speech as such shouldn't be associated with a political, ideological group that favors one set of publicly presented ideas and strongly condemns another set.
The danger is that if the Tor network gets very dependent on Mullvad, then Mullvad might pressure it to make the network censor ideas it doesn't like.
The danger is that if the Tor network gets very dependent on Mullvad, then Mullvad might pressure it to make the network censor ideas it doesn't like.