You're right, when I tried again the field was hidden behind a link. Last time I checked (sometime last month) it was a field that defaulted to bsky.social (maybe within the account name?). Or I could be misremembering.
Yeah - technically the same button, but with a slightly more subtle treatment. People were getting confused by it and bouncing. IMO, since it's only really useful if you already know what you're doing and already have a PDS ready to go, there's no harm making the first-time experience smoother.
This is all totally going to change when OAuth rolls out, so hopefully we can find a better compromise then.
In any case, my previous comment is wrong indeed.