It doesn’t matter what company makes the tools you use. What matters is what the final product looks like.
What determines which tool you use in particular is determined by how comfortable you are with the given tool. If you’ve been using a particular tool for a while, even if it’s outdated and lacking in fancy features, if you can make it do what you want, what does it matter?
To draw a quick and dirty analogy, let’s talk about a crescent wrench. You use a wrench made by Stanley. Your friend uses a wrench made by Craftsman. Your friend insists that the company should switch to Craftsman tools because he likes the grips they put on the tools. You don’t honestly care, because your Stanley wrench works, and you aren’t bothered by the grip.
This analogy falls apart in the computer world sometimes. Exchanging files with other people, for example, can be a headache if people are using different applications. But if you’re working on a project solo, and can produce the output you and/or the client desire, who cares where it comes from?
So ask your friends that if the “industry standard” was to jump off a cliff, would they do it too? It doesn’t matter what other people do, what matters is how YOU like to do it, that you’re comfortable with how you do it, and that you get the output you want and your clients are happy (and giving you lots of money because of it).
Oh, and Mac vs. Windows is irrelevant, same argument as above. Tell your friends to grow up. (I like them both, I use them both.)