RR01, My wife, Ellen's hematologist eventually thanked us for teaching her not to panic in response to low (but not dangerously low) platelet counts. What wisdom we were able to pass on to her was wisdom we had gained here on this website. Her humility was a breath of fresh air! Eventually, ITP patients learn what counts they can live with, based on symptoms. It was a gradual process, which often meant asking for a repeat count in a couple of days before treating... lots of "watchful waiting".
I have a theory, that part of the autoimmunity means that as your platelets drop, so do your antibody levels, which allows your platelets to recover. Similarly, when treating causes counts to rise, that causes antibodies to rise, creating a rebound response of platelets falling again. It's just a theory, but I have certainly seen where people who treat get into these crazy fluctuations; and I have seen where people who don't treat often stabilize at tolerable levels. The wild fluctuations end up being more scary than low counts that are predictably slow to change. I think that's what you meant when you talked about living with lower counts being "much more peaceful". 15k isn't so scary, if you're not afraid that the next morning it will be 5k or even lower. I even remember a man on here years ago who lived happily with counts steadily in the 4k-5k range. I don't recommend it for everyone, but it worked for him. He joked about how he missed juggling chainsaws, but otherwise he led a normal life.
The greatest lesson I learned from this website -- and I remember learning it first from Sandi -- is to calm down and don't overreact. Take it slow. Don't overtreat. Learn all you can, because the more you know the more you will realize this is not so scary, at least for the vast majority of people with ITP, with very few exceptions.