I wish I could tell you that this was the first time I have heard this, but it could not be further from the truth.
Under no circumstances let a stylist attack your hair with texturising/thinning shears, it will make your hair FLAT and FRIZZY. ...More >
You will definitely get the best results with a soft razoring technique "internal diffusion" which gives you soft supporting volume to prolong the volume and lift you need.
In all my years this is the only technique that truly works.
Please ensure you use a very experienced stylist competent in this technique, as in the wrong hands it will result in your hair been thinner and flatter.