Today I ran into a post in Fstoppers about a guy who switched his whole gear because some told him one brand is better than the other and he will be able to make more professional images with that brand. (Although they are almost the same resolution, and both are 35mm sensors)
As an assistant and a digi tech I worked with people who use every possible camera that's around. I've seen people with $60k shoot out of focus images and others create incredible pictures with iPhones.
Don't let brand names and other people decide if you are a good photographer. Invest your time and money in learning the trade instead. Learn how to light and see light. Learn how to pose your models, how to compose a landscape. Build a good team around you.
Yes, you have the gear for the job, which sometimes calls for big megapixel numbers and high dynamic range. But don't make this the only or the biggest measure of your professionalism.
And how does the Rolleiflex come in here? Well, if you learn how to shoot with a fixed lens medium format film camera where you don't see the image immediately, you have to load new film after 12 frames and most importantly you have to bow down in front of your subject, then you will learn how to respect this trade and you will be able to create good images with everything.