[2019] No love for the Solo Player

I can run missions on Hard Solo . . .
Challenging? Hell no.
Heroic? #$%@ no!
The problem is not to "get gud" either. I don't know of anyone that can solo a challenging mission or stronghold. I tried "challenging" Tidal Basin solo and . . . it did not end well.

Is any content stuck behind these difficulties? I know I am missing blueprints that can only be found at challenging Checkpoints (which are also ridiculous to do solo).

Fix that good sirs.

Thanks,
-Jim