Antibodies tests right now are unfortunately horribly flawed and there is no solid info on how long or even whether immunity is conferred.
The fact is that any opening is going to done slowly, with social distancing restrictions in place. Right now, colleges and schools are uncertain whether or when they will be able to bring students back to in-school learning, so they are making contingency plans for different eventualities. This is smart, leaves less to chance or last minute, and gives kids time to wrap their head around the changes coming.
There is almost no situation right now over the summer where rinks open and it's business as usual. Like it or not, conspiracy theories or not, the best thing is for leagues to work with rinks now to come up with plans to keep kids safe and get them back on the ice in some capacity -- skills drills, skating skills, eventually some in-rink scrimmages -- with the least chance the entire rinks or teams will be placed in quarantine and possibly put some rinks out of business for good.
Jumping up and down over what should be is not going to be helpful. The goal needs to be simplified for best success: get kids on ice skating, eventually doing drills, eventually, possibly playing in-house games that reduce spread to every rink in the region and getting shut down again completely.