People learn things at different paces and with different strategies, and some just want to learn on their own without a seasoned pro walking them through it
Create a 1/1 colorless Gnome artifact creature token
The Key lets you slip gigantic cards without trample past chump blockers and the Staff lets you stay untapped to block while simultaneously tapping down opponents blockers
Sadly, most of the creatures that do this are legendary already, but Traveling Chocobo, Starfield Vocalist, and Roaming Throne are great options
There are a variety of ways to punish opponents for drawing cards in Magic, and sometimes theres just a good old-fashioned group hug in Commander
If WotC abolishes the reserved list and reprints the cards on it, they could lose their value, and the collectors who had invested in the cards would no doubt see their collection lessen in value