This is a good point. Once you can smith Daedric in Skyrim, it is pretty easy to make multiple sets. Ebony is plentiful and you can buy Daedra hearts at your local alchemist. Contrast that with Morrowind where there are only two sets of Daedric Armor in the entire world (including expansions). Since you can only enchant gear once, that really makes you think about what enchantments you want to put on it. They should not have made Daedra hearts an item that was stocked by vendors. They should have been rare and hard to get.
Even if you never go to an alchemist, Daedra Hearts are easy to get.
Just do the Mehrunes Razor Daedric Quest and you can have an unending supply of Daedra Hearts (and some
really good loot on top of it...).
And Daedric Armor/Weapons
are rare and hard to get. I can guarantee (almost) that once you reach a level and Smithing Skill where you can make Daedric equipment, that you are most likely the only person in Skyrim churning it out. When was the last time you remember seeing a vendor stocking Daedric Equipment that you
didn't sell to him in the first place?
Plus the time it takes to get to the 100 in Smithing to be able to rip out Daedric equipment is no small amount of time adventuring, even if you're spamming the forge to get to 100 it still takes quite some time and effort. You have to resupply with leather, leather strips, and Iron ingots at sometime and the vendors only sell so much.
It's not as easy to get the best stuff in Skyrim as the OP states. It
was infinitely easier to get it in Morrowind (as so many people have already mentioned), all you had to do was commit a small couple acts of larceny and "poof" full set of Glass.
Naw, it's actually pretty challenging and time-consuming to get the best stuff in Skyrim. And since 1.5 dropped, they retooled how the leveling of the Smithing Skill works, so it takes
much longer to get to 100 if you're just churning out Leather Bracers and Iron Daggers. You have to make Leather Armor (the "cuirass" part) to keep the grinding on the same scale as before 1.5.