I mean, in terms of money, yeah, since the Steam version of BaDIK costs around $10 and it's a one-time payment whereas some patrons will be paying $10 monthly and will have been doing so for some time now, so Steam players who aren't patrons spent a lot less money on it.
The drawback for Steam players is having to wait until the entire season is done, and that depends on how many episodes DPC packs into season 2, so it could be a year or longer before they get to play it. Patrons, on the other hand, get to play each new episode as they come every few months, and people can also pledge when the update is released so they only have to pay once every few months.
The issue I see for a potential linking of Patreon with Steam is that patrons pay Patreon, not Steam, so Steam surely wouldn't be making money from patrons who can get the game on Steam by linking their profiles, if that's possible, because they're already paying Patreon. There's also the fact that, as DPC has said, the game isn't available on Steam in certain countries, like Germany, so making the game Steam exclusive would cut off patrons in countries where it's not able to be played.
Other big devs have tried to do this whole encryption, DRM stuff before and I'm not aware of anyone who's been able to make it work because it can be costly and hard to implement. Even if devs don't like their games being shared for free, most are doing OK income-wise and even the ones that aren't are generally happy to have lots of people play as it helps boost their profile.