I guess you dispute that everything vibrates too, even rocks,?
If you want to, you can find vibration occurring in many things, but that does not mean vibration is the reason something works. If I pick up a rock and use it to hammer a nail in, it's the momentum of the rock which drives in the nail, not vibration. If I clean a stain with bleach, it's the chemical action that makes this work, not any vibration.
In alternative treatments, it's not uncommon when people do not know the mechanism to claim some vibration effect is behind it. Homeopathy (which usually does not work anyway) is claimed to work via some "vibration" or "frequency". Biofield therapy is also claimed to work through vibration. I've also seen bogus "energy healing" machines which claim to work through vibration.
The imagery of vibration may be appealing, and you might think of it as a useful metaphor. But it's not science unless you explain
what it is that is vibrating (ie, the state the medium the vibrations exist in), and how you measure those vibrations.
For example, in with radio waves, it is the electromagnetic field which is vibrating. With sound it is the air which is vibrating. With earthquakes it is the Earth's crust that is vibrating. All these vibrations exist in a specific medium, and are detectable and measurable.
But in alternative health, when they talk about vibrations, they usually do not mention what it is that is vibrating, nor how you can detect and measure those vibrations. Hence their statements are not science.
Although sometimes you might find some measurable vibrational correlates: for example, meditation is known to alter brain waves, which can be measured on an EEG machine. Meditation can alter alpha, theta and gamma waves in the brain.