No, it doesn't take the same amount of skill. Bricks make your lines straight every time. A color set makes it so that you don't have a way to blend colors. Even drawing for, say, comic books...there's no way that you could put pixel art on the same level as that. It's preposterous.
A skilled pixel artist would use dithering to overcome the problems of a limited color palette. Here's what I did with only four colors:

... and even the most clashing colors can look good (but strange) together:

And here's even some two-color dithering:

I'd say that it takes
more skill to blend colors by dithering than actually blending them physically.
Seriously, look at this page and then tell me why you don't think that this is at the same level as comic book drawings:
http://www.gas13.ru/v3/pixelart/zx-spectrum_gfx.phpOh, and being able to draw straight lines easily doesn't count. Skillful artistry is usually not about drawing straight lines. That's what you use rulers for.