The fact that it allows you to play an additional land when activated means you don't really lose on value when sacrificing stuff, especially if you took the precaution to play at least 42 in your deck
Companies like PSA, BGS, and CGC assign a score on a fixed scale, and that grade becomes the shared benchmark buyers and sellers rely on
In formats where players regularly do this - like in Legacy, thanks to Brainstorm - this spell acts as a deterrent of sorts, and also balances things out by allowing you to pour as much mana as youd like into your card draw
"Doppelwarrior" can Special Summon itself when "Junk Synchron" uses its effect, increasing flexibility further as it means the latter can Special Summon a Tuner monster to take advantage of the former's "Doppel Tokens"
Feywild Trickster Its nice to have a bonus effect that triggers just by rolling a dice
The card itself should also be secure