If you're a full time ER doc, the average would never be 250k per year, unless you work in academics, NYC, Denver, etc (basically pockets of saturation). Medscape and other surveys are usually on the lower end for ER salaries. The average right now is 350k minimum, so you're asking for a 30% decrease in salary. I have not seen this in any specialty in any number of years. There's too much doom and gloom all over SDN.
Anesthesia has CRNAs. Ophthalmology has optometrists. Radiology has AI/technology. Derm, GI, surgical subspecialties all have private equity looming. Non-surgical specialties all have nurse practitioners waiting in the wings. Community ICUs are being staffed by NPs at night, while the intensivist is on-call from home. Surgical specialties will one day have NPs/surgical techs doing the non-critical portions of the surgery. Robots will then take over.
OP, I would stop worrying about the future of medicine and just focus on what you like to do or what you hate the least. If you still can't pick, then choose based on lifestyle, then potential income level. It is still a job and many physicians have other hobbies or even change careers.