oh, no - I cycle prog because there is no other way to build up a backstock otherwise, and to match the monthly hormonal cycles we see in cis women. And also because I primarily use prog for sleep, not anything else, and that's only relevant when my E levels are high, which is only during part of my cycle.
Most people probably take it for breast growth; I wasn't motivated by breast growth (my boobs are big enough, even if they seem small on my frame) and I'm not 100% sure prog actually ever resulted in more breast growth for me anyway.
I started it as an anti-androgen mostly, and as a way to help me sleep when my E levels were elevated when I did monotherapy.
Now I guess I can technically live without it (when I travel sometimes I just forget to take it and it's fine), but I do get better sleep at the height of my cycle if I take prog, so that's what I use it for now.