Bit of a broad assumption. The average PPL never goes beyond being a PPL and never gains an instrument qualification.
but they will go off flying by themselves without being supervised by an instructor and possibly with other pressures on to go flying in less than perfect weather. At least if they understand why they need to have thought about an MSA figure it might save them.
They might get VMC on top or find a big gap to let down through - a whole lot better option than grovelling around too low in poor weather.
The European licence removed that 4 hours and teaches only enough instrument flying to do a 180 degree level turn untill you become visual again
I was scrambled to a job from Chivenor where a PPL had set off with chums aboard to fly from Swansea to Shobdon - the weather was marginal and they went IIMC at the top end of the Neath valley. He executed his 180 turn but, due to limited instrument skills, stalled it halfway round as he lost speed and climbed slightly. That saved their lives as they missed the top of the hill by about 30' and stalled the aircraft nose down into a wood.
When we tracked their 121.5 beacon and broke cloud at the very top of the hill, we saw them waving from the corner of the wood and took them (uninjured) home.
You can't ignore the need for some basic IF skills with UK weather unless you never go flying - if a few use those skills unwisely then that is their lookout.