There would not be uproar if you celebrated being heterosexual - Loaded magazine actually did hold a "straight pride." There was no uproar. Some gay people even attended. The fundamental flaw with this is gay pride is not just a celebration of being gay. It's about sticking a middle finger up at the suppressive homophobes out there both in the UK and abroad. Admittedly the UK is a much easier country to be gay in than, say, Iran, but that's not the point. Gay pride (and other "gay days") aren't defending the rights of gays just in the UK - it's a global effort. When was the last time you heard of someone being hanged for being straight? Or beaten up at school because someone thought they might be straight? Or committing suicide because they cannot reconcile their heterosexuality and their religion? Never.
That aside, back in the UK, societal attitudes are still negative towards gay people. Look at Jody Dobrowski. Obviously, as with racism, homophobia will never be totally eradicated - and it's a million times better than it was before. However, a black person should now no longer go out and feel scared that they might get beaten up because they are black. Yes, it could happen, but it's highly unlikely, and I should imagine the black "community" feel as safe as the next person frequenting bars and clubs. However, the threat of homophobic attacks still lingers in the mind of every gay person who is going out. A gay person can still not walk down the street holding his or her partner's hand without being stared at or hurled abuse at. Gay people cannot kiss in the queue at the supermarket. The law protects people's rights to do these things, but society does not.
It's very easy to be straight and subscribe to this "you've got the same rights now shut up" attitude. It's quite a different matter when you're actually gay. If you're not homophobic, these days should not bother you in the slightest, but they do do a great deal for raising