You spoke and I listened. We made corner blocks for the legs so that they should be plenty strong enough.
Here’s a picture with the corner blocks installed into the bottom and top horizontals.
These were the most difficult and dangerous thing we’ve ever made in the workshop. They took dangerous cuts on the miter saw and table saw. We will never do them again and will make a jig next time to be safer. Here’s what the side verticals looks like next to the horizontals.
Here’s the same with one of the stretchers from side to side.
-- Doug - When all you own is a hammer, everything looks like a nail.