Depends, if you do it as career, or just for fun. In majority of companies the difference between mid and senior is solely communication skills. Most companies require mid devs to have decent communication skills. By communication skills I mean clearly and concisely communicate your ideas to your peers and to business. You also will need to push back work In a way you won't appear lazy. Otherwise you'll be that guy, who stays late on Friday, and still fails to meet deadlines.
And yes, if you're year or 2 In your career, you might be happy with just making cool stuff, when being told to. But then you'll see your peers progress in their career, and you will want to be senior, or to work in higher tier company.
With regards to cognition, you should be smart enough to crack that interview questions, but that's not the main career driver.
I used to work with a guy, who was just awful, he had senior grade despite being barely able to code. He had good reputation there. Why. Easy: he glowed. He knew how to pick work that's not hard, but visible. Security champion duty? This guy is in. What does it mean? Hell be mentioned in all docs as such, that's it. There was not a single improvement in security from his side. Team inherited project ridden with bugs, that needs to be fixed ASAP? "I don't want to do it". He goes and refactor some shit cause he " drives quality".
I'll give you another example. I used to work with a guy, he was in his 50s. Super smart, new a lot abut network and databases. He was the guy, who could resolve issue whole team was working for 3 days with no success as something obvious. He was technically team lead, but he had no team he was supporting system in his corner and that's it. For a person if his intelligence that's fail. But this was in a company, that puts tech at very high priority. They are fastest in their market and that's the key selling point. No shit, a guy who was fired because he was "slow thinker" for them works at google.
TL;DR of this.
Yes if you want to be junior or work in outsourcing.
No if you want a decent career