Ultimately, whether you wear makeup or not might impact on how you’re perceived by others. There have been studies showing that a woman wearing makeup is more likely to be perceived better
www.nytimes.com/2011/10/13/fashion/makeup-makes-women-appear-more-competent-study.html
And studies showing they a woman wearing too much makeup is perceived poorly compared to someone with more subtle makeup.
You can make your own decision either way, but your choices don’t exist in a vacuum and it may well have an impact on how you’re viewed at work. If you decide it’s all sexist bullshit (it is!) you can choose not to wear it but at least be aware of the pros and cons either way. You might be in a workplace that’s truly liberal on this matter and it won’t affect you at all, but on the whole it will likely influence how people view you for better or worse.
So I favour doing what feels right to you. I wear a full face every day (primer, foundation, concealer, powder, blush, eyebrow pencil, shadow primer, shadow, liquid and pencil liner, mascara and lipstick or gloss) but although it’s obviously noticeable (nobody has naturally taupe eyelids or glossy lips) I think it’s well applied and suits me, and from feedback I know the first thing someone thinks looking at me isn’t ‘woah makeup’. But I enjoy it, I absolutely love makeup, if I didn’t then I wouldn’t wear it.