[BrandoElFollito]

Maybe because this is how people communicate?

I am French and when I speak English I use fuck when someone fucked up. I also say sex when people are, well, fucking.

The f*k, g**y, m***ly and others are childish.

[SamBam]

But there are appropriate contexts.

I don't know your line of work, but presumably there are contexts where you wouldn't say "fuck," like to your CEO, or your top client, or your kid's teacher, or something, right?

So people just have different opinions on where the line is, and that line has shifted to include more contexts. That's simply what people are noticing.