It is certainly possible (and easy) to become disoriented in IMC.
But every private pilot has at least a couple of hours of simulated instrument time and should be capable of navigating their aircraft back out of a cloud.
You are taught, if you have a competent instructor, to ignore your senses and rely on the instruments in such situations, as well as recovery from unusual attitudes by instruments alone.
I don’t doubt that people forget their training or don’t keep current however.
Also, there is no such thing (for light aircraft) as an unrecoverable attitude that results in impacting the ground a minute and a half later.
Any properly loaded certificated light aircraft can be recovered from any attitude if you have that much time.
It takes a max of about 10 seconds to recover an aircraft from any unusual attitude and reestablish straight and level flight.
A spiral dive (the typical situation with loss of visual reference) it might take 15 seconds since you have to bleed off the speed you picked up.
There might be some extremely low drag aircraft that might be a bit more problematic in that regard, but they are typically also capable of much higher VNE limits.