The NSFW tag is part of the mechanism to curate the feed.
I'm not sure why people get offended by people wanting to use social media but not wanting to view content that can get them fired. If the content doesn't bother you, then you shouldn't filter NSFW content. It's not like the NSFW tag is censoring the content and preventing you from seeing it if you click it.
For people with jobs, why not make it easier to filter the things that companies don't like? It doesn't affect you any.
What do you think the tag is for?
People at work don't (shouldn't) click on NSFW-tagged content. If it draws your eye even more, then I assume you don't browse from work.
How would it defeat the purpose to tag content that most workplaces would not be okay with? If you don't mind seeing the content, then the tag might entice you. People at work will recognize it and not click