As an industrial designer, I was asked, during interviews, which softwares I knew ( 3D modeling and drawing/sketching).
And let me tell you it's like a fashion. When Rhino was starting to be hype in the design industry, then Rhino was a must have on your resume...
As a result, most people ended up lying.
- A// Because most of recruiter don't know what those softwares are. And they just need to check a box. Do you know Unity? yes/no. You're in or you're out.
- B// Software isn't that hard to learn... I switched from 3Dsmax to Maya, to Alias, to whatever you name it. Most of those softwares have hundred of tutorials on youtube, books and a good forum/community.
If they ask you to learn Unity for a really interesting internship, just say you're familiar with it and you're always curious about the new add-on and functionality of it. Learning a coding language in the other hand is absolutely impossible in a short amount of time... And by that I mean less than 2 or 3 years...
I fully agree when people say it's the result that is important and the tool is just a way to get there. Look at the Unreal Engine. It's for free, but do you have the skills to make a full high poly AAA game? No way, remember that Ubisoft's studio that makes Assasin Creed's has more than 1000 people, Candy crush represent at least 200 full time employees... Remember you can only do so much. They're maybe testing you're ambition and ability to learn new stuff. Just say you do have what it takes and look confident, check videos on youtube, get familiar with the basics, and learn because that's what internship are for.