RRA unfortunately doesn't necessarily guarantee quality.
Here's my big thing on training. We are supposed to be setting ourselves up for a lifetime of learning, improvement and experience. The problem in this profession is there is always someone ahead of you holding you down or stabbing you in the back. You lack the letters and someone else down the road will be able to block your path and your privileges. And it won't necessarily be an orthopod. Won't matter if you complete industry labs, scrub with other doctors, talk through cases, work with residents, seek growth to learn something you weren't trained in during residency - you skip the RRA you lose the certification path forever and in a lot of places you lose surgical priviledges and it doesn't seem like there's a remediation pathway to get them back. Essentially, you start off your career by limiting yourself and your growth. Its 3 years now, but its 30 years of your career later.
Do you need to be able to do those things to have a successful career? Depends upon what you want to do. Perhaps you will want to be the guy who tackles big cases or solves the problems that no one else can solve. There are a lot of pods who have zero interest (or training) in rearfoot. It is possible you'll do your training and still want to pass on these opportunities.
I'm personally skeptical you're missing out on that much revenue.
Where I really think you will be missing out is understanding the foot. We've literally take one of the smallest body parts and tried to divide it into the most delineations and its entirely artificial. Its all one darn thing. Its all interconnected. Its how you end up with hammertoe docs having no understanding or concept of equinus. Its how you get people with metatarsus adductus and wonder why your Austin failed even worse than normal. It produces doctors who only have a limited tunnel vision hammer and see everything as a nail. You don't even necessarily have to be able to fix everything - you just need to be able to recognize the bad stuff when it shows up so you know when to refer or know how bad things are or that you are over your head. Put yourself in a position where you can say - your problem is complicated. This isn't your friends foot that they got to walk on right away.
My personal thing - I always wonder about the doctors who have to spend their entire career trying to explain their surgical fails. Essentially the Austin guys who show up at the first post-op visit and the patient says - doc the bunion is still there. No, no, its great. Uh, we need to tape it a little more. Uh. You must have walked on it. Oh, well shoot, I guess we'll have to go back in and do an Akin. Don't worry - it'll be perfect.
Small rant, but so much of the training is just wrong and pointless. Get the best most diverse training you can get.