Knowing how to do something, especially something you're interested in, will never be a bad thing. If you have the time and the motivation, go for it! But it's important to think of it as a secondary skillset, not one that will replace your design skills, only bolster and build on them.
I've been on the dev side and the designer side, and when a designer tries to explain to me what they really want but can't do so because they aren't familiar with "the developer way," it can be really confusing. So do it! Plus it's really fun.
Knowing how to do something, especially something you're interested in, will never be a bad thing. If you have the time and the motivation, go for it! But it's important to think of it as a secondary skillset, not one that will replace your design skills, only bolster and build on them.
I've been on the dev side and the designer side, and when a designer tries to explain to me what they really want but can't do so because they aren't familiar with "the developer way," it can be really confusing. So do it! Plus it's really fun.