It depends on who built the trap. John Kramer is the original jigsaw and came up with the whole "the choice is yours" thing so his traps are always technically escapable. Amanda is the first apprentice and breaks John's rules by making traps completely impossible, she ends up in three separate games (if you count Saw 2) because John wanted her to stop. Then there's the cop who's lead killer for like three movies but I still never remember his name, he just straight-up murders people so obviously his traps aren't always winnable either. I'm not sure why he even bothers with traps. The guy from Spiral has no real connection to Jigsaw and just uses traps as a cover, but that's also a detective movie more than a Saw movie; the plot would barely change if there were no traps at all.

Yeah and it's not really a series that is concerned much with maintaining continuity considering #7 out of 10 is called the final chapter. Most people are into it for the comeuppance and mousetrap gore.