Gear is the barrier to entry, and all your previous keys are your resume, but you could always join a guild and let your guildies help you with few keys I guess. That’s what everyone does.
I personally couldn’t care less about mythic+ or raiderIO and I’m not saying it perfect system, but it works for the people that do mythic+. One of the best take on this subject I have seen was by a mythic+ player…