The real issue isn't the vibrations damaging your brackets - it's that you need to be way more careful about how you angle the brush and where you're applying pressure, since a sonic toothbrush can dislodge bands or wires if you're not paying attention. Most people find they can keep using their Sonicare just fine once they adjust their technique. Hold it at a gentler angle than you would with a manual brush, avoid jamming it directly into the brackets themselves, and spend extra time on the gumline rather than aggressively scrubbing across the wires.
The thing people often overlook is that you'll probably need to spend longer cleaning around each bracket than you expect - maybe 30-45 seconds per tooth instead of rushing through. Your Sonicare can actually be better than manual brushing for getting underneath the wires and around those tight spots where food gets trapped, but only if you're deliberate about it. If you're using the same pressure and speed as you did before the braces, yeah, you could catch a wire or band the wrong way.
So don't ditch it necessarily, but definately ask your orthodontist which specific brackets you have and whether they've seen any issues with sonic brushes on your setup. Some brackets are way more robust than others. In the meantime, maybe slow down your routine and be gentler - the whole point of a sonic brush is the vibration doing the work anyway, not you forcing it around.