You need to be able to beat the common archetypes with any deck you are building and in order to beat the fast agro decks you typically need lots of cheap things to be playing so as to not get overrun too fast
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Also note that you destroy everything and then you draw a card for each one destroyed, so that should draw you a strong amount of cards
Source: MTGStocks Artificer's Intuition, a Fifth Dawn rare that most Commander players have never heard about, just went up over $9 , an increase of about 65% in the span of just a couple of days
And then there's Phyrexian Vindicator, which is just purely nasty and powerful as a 5/5 with flying that redirects damage
Local hobby shops, aside from have more freedom in how they limit purchases, also provide a space for people to connect more