I don't think you're arrogant for surveying the current landscape and being concerned whether what you see is a net positive or negative. On the one hand, places like you described are helping revitalize this corner of the gaming community and giving people a fun time, which means maybe we get more games (both in terms of new games being made and old games shaking loose into the market because people are suddenly wondering what they have in storage). On the other hand, maybe it makes collecting more competitive as resellers get greedy and people buying for investment purposes price people like you and me out of the market.
You may be right that you have a more extensive collection than the restaurants or exhibits you see, but you may learn about new resources to aid in your collecting, or you may connect with new collectors who want to help you (either by buying your duplicates or letting you know what they see when they're out hunting).
I often catch myself in a moment of arrogance or self-importance and feel bad that I do, but what matters is that you notice it and decide what to do about it, training yourself to ignore a toxic instinctive response and focus on what you want to think and feel instead.