People do want to get paid in Bitcoin, because it's easy to deal with it. It's easy to send and receive payments, they can't be frozen, you don't need to call your bank to authorize a large payment, etc.
Euros, pounds, etc don't solve the problems that attract Bitcoin users.
Not to mention nobody accepts euros and pounds in the US, so there's no real point in getting paid in them, but Bitcoins get more and more widespread every day.
Also I don't care if Bitcoin price is going down at the moment, I still want to get paid in Bitcoin. Unfortunately the people I bill don't have that option.
Also known as fraud prevention.
Multisig, paper wallets, multiple wallets, insured storage, etc.
Well, that's ok, you get paid in your local currency and then you go buy more bitcoins!
As for paying with euros and pounds in the US, that mostly applies to cash transactions. I'm having about a 100% success rate paying in Euros when I buy stuff from/in the US and Canada using credit cards tied to European bank accounts. All the exchanges happen fully automatic at some (relatively transparent) percentage, not unlike the fee a bitcoin exchange takes (assuming you get your money back at all...).