- Pseudo card advantage. If I have two Forests and a bounceland, I can get up to 4 mana in play off those alone. Three Forests, or two Forests and a Lotus Field only gets to 3 mana.
- Scales better with extra land drop effects. With Amulet out, Lotus Field gives you a one-shot boost of 3 mana. Playing a bounceland gives you a one-shot boost of 2 mana. That seems worse at first, but with extra land effects, Lotus Field gets overtaken. You can play bounceland, tap it for 2 mana, return it to hand, then play it again for another 2 mana. You can't do that with Lotus Field because it makes you sac, not bounce.
- Bouncing Tolaria West. Self-explanatory, TW's ability must be activated from hand, not the graveyard (i.e. where Lotus Field would send it).
The other (much more exciting) possibility is Restore Balance, since it kills your own lands, and having one Lotus Field to your opponent's one Island or whatever post-Balance is much more advantageous for you. It is a little slow since it ETBs tapped though. Nevertheless, Tolaria West can grab it, so you can just play one copy and still have a total of 8 kill-my-lands effects (4 Greater Gargadon and 4 TW into Lotus Field).