To me it's not the Memorial Day marker that is troubling...it is them shutting it down for the entire summer.
For me, it is much too early to make that call.
Then again, I dont know how they staff, how far in advance they need to plan inventory, food shipments, etc. so perhaps that plays a role (ie can they be ready to open with 30 days notice? 60? 90? the longer it is then maybe I get it).
In general, it is much too early to say the summer is a washout; as close as I am to this pandemic, I am going to remain optimistic that things will (continue in some cases) turn for the better....and we can all get back to "normal", even if that term and what it brings, is somewhat redefined.
Just hope there are no rebound breakouts over the next 2 to 3 weeks in states that are re-opening.