[watwut]

It really does matter for spoken language as much as for written. Yes people will be able to understand meaning most of the time, but no, you will sound as bad as if we're writing.

It is one thing if you mix up gender occasionally. It is entirely different if you just don't care and get it wrong often. And entirely different if you do it as part of shtick intentionally mixing it in specific way.

Accent and ignoring genders or suffixes are different things. You really can't equate them.

[LorenPechtel]

Note that if you're coming from a non-gendered language you'll mess it up frequently even if you care. There's a reason Chinese people are notorious for getting gender wrong!

[watwut]

You will mess it up even if coming from other gendered language, because the genders will he different.

But it is one of things you do end up memorizing the same way you memorize the word itself or its conjugations. It just does not make sense to go "I don't care about this stuff and won't learn it" and then demand language app will accommodate your refusal to learn gender.