A crutch is always a compensation for a deficit - but you need a proper diagnosis to select the right crutch for the problem at hand! Esp. with wrist devices, I have the feeling that many players with a rather poor release go out, buy the biggest thing they can find, and think they are bowling better (did this myself when I started playing).
But: things do not work out fine this way. You add revs, but the release is still poor. It can be a timing issue, a poor drilling of the balls, there are a lot of factors to check before you can actually pinpoint a problem and ACTUALLY make an educated guess about an additional help.
Most of the time, the ego needs a crutch, because that omnibus load is hard to shove around...
On the other side, there are - esp. concerning wrist devices - many different models and solution available. And in some cases a specific model "cures" a certain problem, so such a crutch is nothing I'd basically reject. But from my experience, there are rarely indications (e. g. true health issues) which justify a wrist device. Consulting a coach is IMHO the first thing to consider.
