This is a personal view, based on my own attitude to risk; it is not an attack on the IMC rating nor those who use it.
I fly about 15-20 hours per year (30 in a good one) and thus cannot fly the a/c without conscious thought as a result of this low amount of practice.
Therefore I plan and fly in good VMC; if it is marginal I make a firm no go decision.
If the weather does something unexpected I will either divert to the nearest airfield or turn back, whichever is appropriate.
I do fly regularly with instructors to ensure that I can generaly handle the a/c in IMC, with the plan being a 180 into VMC.
However, I know that my low time (with gaps sometimes) would impact on my spatial and situational awareness in IMC, thus my view.
I could get an IMC rating easily enough (AN instructors view) but maintaining safe currency would be the issue - and if you don't use it, you'll lose it.
Once again, this is not a dig at others, but a response to the initial question.