The problem is playing in WOTC sanctioned events which do not allow for proxies. I can get why they want to do this, the whole point of these events is to sell

The problem is playing in WOTC sanctioned events which do not allow for proxies. I can get why they want to do this, the whole point of these events is to sell more cards. However there is a gameplay advantage as well. The high price of cards keeps players more stable and invested in their decks. You don't see players constantly running whole new decks, and sometimes people get creative due to financial or card availability constraints. I was a part of a weekly legacy group that ran with a house rule of 10 proxies allowed. This hit a nice compromise between people being able to play decent decks while still having some kind of stability in the local meta.