It feels really good to be proficient at something, right? I mean, it is objectively good to be able to build a website, write a song, speak Japanese. It is great! There is no doubt about it. Developing a skill takes time, effort, money and even in some cases, suffering (again, man, that plateau thing). But it is all worth it because now you can flex your talents, you can create; you are a god amongst men, correct?
Again, having an expertise is awesome, but obviously it doesn't grant godly powers and, more important for today's topic, it has its own shortcomings. Because of how our brains work, when we become proficient at something we edit and 'automatize' some processes. This is a huge time saver as well as efficient in terms of effort. You don't think about how you conjugate the past tense of a sentence in your native language, do you? It's something that is already there and you just do.
But sometimes this obvious stuff that we take for granted can make a huge difference. And that's why it is very important to be accompanied by people of different surroundings, backgrounds and types of proficiencies. That way, everyone is a noob at a subject and can pitch in from inexperience (which might be more valuable than you think).
You probably have heard about the term 'echo chamber'. It's Wikipedia page defines it as "a metaphorical description of a situation in which beliefs are amplified or reinforced by communication and repetition inside a closed system and insulates them from rebuttal". This concept is used a lot in news media and social media, but it can also be applied to entrepreneurship and business projects.
If your startup is made up entirely of developers and stumble into a problem, there is a small but real possibility that none of you will be able to see the mistake because perhaps it is hiding in plain sight, on the overlooked and obvious stuff. Basically, you are trapped in an echo chamber of your own knowledge. But it might take a second to an inexperienced eye to suddenly just say something like: 'Hey, shouldn't this have like a 'start' button or something?', and solve the problem (I'M OVERSIMPLIFYING, PLEASE DON'T COME AT ME).
This is, in part, why the No-Code movement have been so refreshing. Many ideas come from eager but perhaps inexperienced (in the traditional sense) visionaries.
So let's open up a little more the conversation every once in a while. If you are working with a large team maybe you'll want to pivot some developing ideas with the guys from marketing or the design crew, and that can also be true the other way around. Demolish the echo chamber and be open to getting roasted for not having a 'start' button.