I don’t think this is about tech or professional vs recreational diving at all. It is about safety. Airline industry and (later) Anesthesiology are 2 professional areas that have pioneered the knowledge about operational safety, and even in those environments the use of checklists and alarms is crucial to increase safety. Absolutely zero pilots or anesthetists will tell you that alarms on their monitors are just for “recreational” guys. They are important and some should even be mandatory. Now I agree that it is important that you can customize the alarm, both the parameters that set them off and the type of alert. I agree that the more advanced you are at something the better you can manage situations, you can tolerate wider intervals of said parameters, and having less invasive alarms is normally better. For example different people will want/need to be warned at different stages as they approach their NDL. Maybe some need a flashing alarm with 5min to. Others just need a small vibration with 1min to go. I’m sure others can come up with examples fitting for tech diving. But saying that “I’m so advanced that I never fail and never need an alarm” is to me the first step into creating a chain of mistake that can have devastating consequences.