just make entering email addresses optional.
I've lost count of the number of surveys I've filled in over the years.
Happy to do another one.

As far as biggest problems go.
It laregely depends which Am technology you're talking about.

The biggest problems in fdm are caused by cheap porrly built machines that are marketed as being the best thing ever.
Not just creality either, lots of companys jumpd on the ender 3 design bandwagon.
That is the single largest problem in home 3d printing. Simply the fact that people are encouraged to buy barely functional junk.

As far as resin printing goes.
My main issue would be the almost impossibility of getting first layer as detailed as you can do with fdm.

I'm not sure if it's back scatter from the uv light reflection from the aluminium build plate or the way the resins work.
But it's really frustrating :-)

So those would be my two biggest issues with the current home Am/3d printing scene.