Here are the pros and cons of using proxies
pros
>access to any card you want without giving money to some scalpers or investment tards
>doesn't gatekeep anyone from joining the game
>some cards are really just not worth the pricet ag on the sec market
>fucks over scalpers, hoarders and speculators
>everybody can have fun
>you can make proxies with custom pictures
>you can make proxies and rebalance cards
>anyone who wants to force you to use "real" cards is either a wotc employee or a scalper so you already have filtered them out
>you don't give wotc any money for their shit game design and pandering to the homosexuals

Cons
>none


Proxying is your god given duty, Anon.