There's kits and there's kits.
What we might call the
Airline Catalog Kit has cheap or too-small stuff in it that you'll end up replacing anyway. Size is the first problem-- making 2 gallons of beer is silly, it's like making one bowl of homemade soup.
A lot of shops, though, will put together all the stuff you need and sell it to you as a package.
(Here's a typical example.) These are oriented to making 5 gallons, which is more normal, and it's quality stuff that will last a good little while.
Then there's beer ingredient kits, which is the cake mix rather than the pans, basically. A lot of people start with the cans of malt syrup, dry yeast in a packet under the lid. I did once or twice, but I quickly moved on to using dry sugars and real grains because, sheesh, you're hardly
doing anything when you use the syrup, not even boiling it or adding hops. It's kinda boring to just mix cold goo. I wanted some sense of having used the real grains, start learning how they behaved and worked.
Steeping some grain for flavor along with dry sugars, or doing a partial mash, just isn't that hard, and it's much more satisfying (and the result is definitely better in my book). Likewise going to wet yeasts was a big improvement in my book, which is not to say lots of people don't make perfectly good beer with dry yeasts (which have a lot more variety, and a lot less contamination,* than they did when they were the only available choice 20+ years ago). I'd say wet vs. dry yeast is less of an issue than starting to get some experience with grain, just because you should.
* Don't panic at the word contamination. You're not aiming for absolute sterility, you're aiming for the yeast to be numerous enough to outgrow anything else, and to produce enough alcohol to kill off anything else. The books talk like skunked beer was a one in four times type occurrence, which maybe it was in the late 70s, but yeast cultures are much cleaner now, and I've never produced an off batch (though I've produced a couple of experimental ones that I thought were too lousy to bottle).