Somewhat related to INTC's fab difficulties: If Intel really wanted to carve out a new niche, they would seek to leapfrog ahead of the ARM Morello project. Developing secure computing for the masses is the long game.
By the time INTC's fabs are able to catch up to TSMC/Samsung's existing offerings, they can potentially be well-positioned to deliver the next generation of consumer SoC's suitable for a corresponding next generation secure OS. Alphabet and Apple have their own plans, and MSFT isn't cohesive enough / too large / too committed to legacy support for existing business.
Amazon, maybe? Or a well-funded startup? If Apple is the only player designing efficient CPU's, that is bad news for security and competition. Proprietary, closed-source security is a particularly insidious form of evil. Oh, and, BACKDOORS ARE NOT SECRETS.
Given how early-stage a research project like ARM Morello is, there is certainly time for a competitor to seek a 10-20 year plan. Don't count out INTC just yet.