Not sure it's a red flag- I bet they're just young. I'm sure they'll grow out of it. We all had unreasonably strong opinions about arbitrary things at one time or another.
If you really hated the way pencils smelled and you're trying to get into sketching, and everyone always says "use pencils", could get frustrating. It's the best tool for the job, but you can probably also get pretty far with a pen.
You can certainly be a successful engineer while never learning specific languages.
That being said, a specific language can be the best tool for the job, and there are many things for which python and js are the best tools.
If you really hated the way pencils smelled and you're trying to get into sketching, and everyone always says "use pencils", could get frustrating. It's the best tool for the job, but you can probably also get pretty far with a pen.
You can certainly be a successful engineer while never learning specific languages.
That being said, a specific language can be the best tool for the job, and there are many things for which python and js are the best tools.