Get a second opinion, wheel bearings are can make some strange noises.
I've had them make clicking noises , growling, happens from 20kph and up. They could be loose as well. Shake the tire and feel for movement, should be none. I've had some that no play but you could spin the wheel by hand and tell.
If I'm dealing with a noise or vibration that may be a bearing it's a road test to verify, put on hoist and try to pinpoint with a stethoscope. Sometimes need chassis ears, electronic sensors that transmit sound if you can't find it on the hoist. Sometimes only make noise under road conditions.
May be getting noise transfer as well in the rear, one bearing is bad but the noise can also be heard on the other side. That is design dependant, some vehicles will do it and others won't.
No time limit on how long a bearing will last. I've replace a few that the vehicles have been under 5000km. Not a regular occurrence but can happen.
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