To be honest the whole lack of content thing is more like a perception than an actual fact. This game easily has the most content out of all four base games.
For example, in build/buy mode the Sims 4 pretty much doubled the number of unique objects in every category compared to the Sims 3 base game.
Object count for some items
Showers & Tubs: 7 (TS3); 18 (TS4)
Wall lamps: 7; 18
Computers : 3; 9
TVs: 5; 9
Desks: 5; 11
Bookshelves: 9; 16
Windows: 26; 57
Indoor plants: 19; 44
Dressers: 6; 12
Rugs: 12; 42
I think that's a fair point, but are you counting re-colors? Like, with Create-A-Style in TS3 you could almost make an infinite number of color / texture permutations of any base object; since TS4 seems to go back to the "Maxis recolors only" model of the Sims 2, you kind of need more copies and styles of objects (windows, computers, etc.) to try to make up for the lack of customization since Create-A-Style is gone.
Yeah, The Sims 4 may be missing a lot of features, but for the features it does have, it tends to have more content for them.
For example:
The Sims 3 Base Game:
1) Old Timey Tele (§200, 1x1, Fun 3)
2) Channel Trowler 27 Deluxe TV (§500, 1x1, Fun 4)
3) ÜberVision Panoramic from Landgraab Industries (§1,200, 1x1, Fun 4)
4) 36 HiFi Plasmondo TV from Landgraab Industries (§3,500, 2x1, Fun 6)
5) WallVuu Standard TV (§8,000, 2x1, Fun 8)
The Sims 4 Base Game:
1) PenguinVision Children's Television Set ($275, Fun 4, Reliability 3 + Comedy Skill) (6 Colour Combinations)
2) Been There, Watched That TV ($500, Fun 5, Reliability 3) (3 Colour Combinations)
3) Trusty Companion TV ($995, Fun 5, Reliability 5) (3 Colour Combinations)
4) InstaVision Flat-Panel Television ($1,475, Fun 6, Reliability 5) (2 Colour Combinations)
5) InvisiView Flat Panel Tabletop TV ($2,500, Fun 7, Reliability 8) (3 Colour Combinations)
6) InvisiView Flat-Screen HDTV ($2,600, Fun 7, Reliability 8) (3 Colour Combinations)
7) GeniusVision Flat-Screen Television ($3,400, Fun 8, Reliability 8) (3 Colour Combinations)
8) GeniusVision Wall-Mount TV) ($3,500, Fun 8, Reliability 8) (3 Colour Combinations)
9) Plasmatron 3000 Flat Screen TV ($8,500, Fun 10, Focusing Decor 9, Unbreakable) (Unlock by reaching level 10 of the Tech Guru career)