Yes. They just want to get those guys going who don't have a proper browser, without scaring them away with too many options. Something or the other has to be missed out - and that is okay - to be fair to all browsers is not the objective here.
It does seem kind of funny to point people to Opera over Chrome and/or Safari. If you're afraid of showing too many options, why wouldn't you just list the most popular two or three that you support? Chrome is, after all, more popular than Firefox now, and vastly more popular than Opera.
