Hello, I am a solicitor with 20 years experience. I will try to help you with this.
No that is not correct. It is better for the prosecutors to have all of you in court but they could chose to proceed just against you if you are the one they have within reach. That is statement of general principle it maybe that in this particular case there would not be sufficient prospect of a successful prosecution against you on your own. This may be why your solicitor has said that.