I have several problems with hiring lawyers to do your application for you. Will pen some of them down here:
- Lawyers are generally not up to date with the latest guidance, and don’t know what’s working. If you look at the success posts and failure posts here - you probably have more perspective and advantage than them here.
- They don’t write well. I’ve seen the evidences lawyers write. It’s filled with legalese and it’s confusing to follow-through. You would be able to write in a clearer manner and with your own first-person perspective.
- They aren’t technical. Lawyers don’t know their GitHub from their npm, and won’t be able to guide you how to best present technically-oriented evidences in your application.
You can use lawyers for the submission step or to discuss visa steps. Beyond that, you will struggle to benefit from them.