You're not wrong, but there are absolutely massive amounts of government intrusion and surveillance that I personally would accept as an alternative to rotting in jail.
The choice isn't just between rotting in jail and something like Promise, though. Many of us on this forum could pay bail and face neither. That's the fundamental injustice here, I think.
Are you saying the injustice is that some people can afford to bail out and some cannot? Or is the injustice that the bail concept exists in the first place?
If the former, then what are we going to do about it? Enforced income equality programs have been quite disastrous in human history. If the latter, well, yes, it's a weird way to get around the fact that the state technically cannot be locking people up that aren't convicted of a crime yet. And for the poor, it very well may be that the choice is between jail and something like Promise.
We are pragmatic founders. We spent most of our professional like advocating for these changes and realized we wanted a more immediate solution. We are also worried that the absence of bail can actually lead to more incarceration. Kentucky got rid of private bail but the system is still fundamentally unjust.