To me it seems like the icath provides an easier access to hormones, which is good. Both therapists should offer care and help regarding transition, social, and blending in. However, I believe most SRS surgeons won't accept informed consent for surgery, (my guess) and that you'll still need at least one, maybe two, sign-offs for GCS, more along WPATH guidelines. ICATH seems reasonable when a transperson is already sure of their gender, perhaps the WPATH wants to help you make sure of your decision to begin transition as some things (HRT) are not easily or entirely reversible after some time.
Best wishes and safety on your journey!
Hugs