I don't think this is a fair statement...I think both require different skills, not that one is better than the other. I shot a lot of wedding (most) with available light only until the reception and not once did I ever use a tripod and my assistant only used a tripod in the back of the church for wide shots.
What I think you forget that in shooting weddings, you have a ton of things on your mind, the shot list, the wedding party names, dodging the videographer's shot and his lighting, 100's of poses, losing the light, ruining the Bride's day if she is not happy with the photos, getting DRUNK uncle Buck to stand straight and stop talking, pinning on flowers on the men, trying to be in the shadows but still be in the moment, catching the once in a lifetime moments that only come once like the KISS, how long your day is (mine were shoots of 12 to 15 hrs) and so on and so on...but on the other hand, I don't think I could stand in a Mosh pit for more than 10 seconds without earplugs and take photos.
I think it takes a lot of skill to do what you do...I know it does. I shot a private concert for Duran Duran a few years ago with a press pass and I have covered a LOT of hockey games and I know about moving targets with only available light. Did I find any of these assignments hard...Sure, all of them...Are any harder than others?...Sure some weddings were hard, some hockey games were too...Duran Duran was really easy because I was a huge fan. Would I have thought the same thing if it were Green Day...Maybe not.
What I am saying is I will never assume that any photographer out there has an easy job. I once worked as an assistant for a professional FOOD photographer and I thought it was harder than anything else i have ever done but he swore up and down that he could never do a wedding and admired me for it. I thought it would be easy because FOOD DOES NOT MOVE but boy was I wrong...
I think each type of Photography has it's tough points and a wedding photographer has a difficult job mentally as well. I am sure that if you like what you do you would not find it hard because you love it.
I don't know if I could do Pet photography...I don't even have many great shots of my cats but I am sure that it must be a hard job...Just like I don't do children often as I find 2 hours of Children photos are harder on me than a whole wedding...LOL
Muushka, I think there may be some $$$ to Pet Photography as I know lots of people who treat their pets better than their children...LOL
As for others thinking of going pro, the best thing you can do to see if you have it, is to get some of your photographs together and bring it to a photography instructor or a pro in the field you want to go into and let them take a look and give you some constructive critisism. It's a good start. Then you can figure out if it is for you. You might even land a job as an assistant if they think you are good.