Self lockpick
Make it to where anyone who is restrained be able to lockpick themeselves but with a lower success rate (maybe around 1 to 5%) but whenever you are in the process of lockpicking yourself, have some sort of sound or small hand animation so you can’t just break out without someone noticing.
Seriously I’ve seen mfs irl get out of cuffs while underwater upside down in like 5 seconds
(This is something that will rarely ever happen and won’t make your life any more difficult I promise
There's already unbinding yourself from BH restraints after 10 minutes, 'Breaking the zipties'. Sure it's just a game mechanic to avoid issues but still that at least seems more understanding and believable than everyone and their mothers knowing how to and being fully equipped to break out of cop handcuffs as well. Sure realistically its possible but there needs to be a line.
Just like Junke said, there's already a chance to get back up being downed, being cut free by friends, suiciding. T