I suspect Bail is an anachronism in these modern times. 100 years ago you could jump on a train and virtually disappear, never be seen again. Now cops can track people's phone to see exactly where they are at any time of the day.
Part of bail is also just to reduce the effort required between the arrest stage and the trial/judgement phase. I think ultimately some kind of monitored release via something like an ankle bracelet (for those at higher risk of trying to run), programs to make it easier for people to remember and make their court dates (text/call reminders and some kind of transit assistance) (for those at low risk of bolting) and just pretrial detention for violoent and dangerous arrestees will provide a cheaper and more just system eventually.
Unfortunately there's a lot of incentives against pretrial release because every time they get it wrong and the person commits another crime while on this release inevitably gets blamed on the system and it's VERY hard to argue the diffuse benefits of all the people who's lives weren't permanently ruined in the face of someone getting hurt.
The miserable life of being on the run might not have been worth the original threat being faced, but, regrettably, it may be worth the original threat + the new threat.
That's why every so often governments will have amnesty-like programs where you are able to turn yourself in with no extra consequences if you have a warrant. Or, for that matter, register for citizenship or legal status without fear of facing the legal consequences for the original illegal entry or overstay of visa.
Though I get your point is more about crimes that would, well, be worth trying to disappear over, still worth pointing out that you can effectively "disappear" across state/country lines depending on the severity of your crime.